Skip to content

What’s a Downpipe and Why Would I Want One?

What’s a Downpipe?

Technically, the “downpipe” section of an exhaust system connects the headers or exhaust manifold to the catalytic converter(s). For most vehicles, the downpipe section is essentially incorporated with the catalytic converter section, and since there’s very little performance or fuel economy benefit to replacing a modern catalytic converter (they’re just not that restrictive), most vehicle downpipes are never given much thought.

However, on a vehicle equipped with a turbocharger, an after-market downpipe can offer a significant improvement in performance. Because a turbocharger is essentially a pump, it’s important for the pipes entering and exiting the turbo to have unrestricted airflow. On many turbocharged vehicles, the exhaust pipes coming in and out of the turbo contain numerous bends. If these pipes are bent using a cheap, crush bending process (a common situation for many vehicles), they can restrict exhaust gas flow in and/or out of the turbo.

By reducing exhaust gas restrictions, the turbocharger can spool up more quickly. Faster spool-up times mean more power and/or better fuel economy. As a result, many after-market exhaust manufacturers offer over-sized exhaust downpipes with mandrel bends.

Why Would I Buy A Downpipe?

You might want to buy an after-market downpipe if:

  1. The exhaust piping leading in and out of your turbocharger contains numerous bends. Some vehicles – like large turb0-diesel trucks – have enough room in the engine bay for fairly straight exhaust tubing. Smaller vehicles can have a lot less room in the engine bay and therefore more pipe bends.
  2. You’ve modified your turbo to run at a higher boost pressure. Some turbocharged vehicles come with a well-designed turbo exhaust system, and in these cases there is very little to gain by adding a new downpipe. However, if you increase the amount of boost on the stock turbo, you may find the increased exhaust gas output demands a larger, smoother downpipe.
  3. The after-market downpipe is proven to improve performance. Most after-market downpipes are both mandrel-bend and larger in diameter than the stock units they replace. Therefore, they can significantly reduce restrictions and make fairly dramatic improvements in horsepower. Adding a downpipe to an olderΒ Subaru WRX exhaust system, for example, can add as much asΒ 40hp all by itself.

Subara WRX’s aren’t the only types of vehicles that benefit from downpipes. Despite having fairly efficient and well-laid out turbo exhaust systems, many late-model diesel pickup owners can add 10-20 hp with nothing more than a new downpipe.

Bottom Line: If you own a turbo-charged vehicle, it’s wise to research your downpipe options. Just be sure that you see a dyno test demonstrating a significant performance improvement before you buy.

204 Comments Post a comment
  1. Cedric
    Sep 25 2014

    I have a Nissan GTR and was wondering should I even bother with getting a downpipe?

    Reply
    • Jason
      Sep 25 2014

      Cedric – The GT-R is basically a factory built race car. The engineers at Nissan have worked hard to perfect the vehicle’s performance without sacrificing reliability, drivability, etc.

      I have no doubt that bolting on an after-market downpipe could increase peak horsepower…but I wonder if the after-market unit would offer the same all-around performance as the factory unit.

      If we were talking about a mass-market turbocharged vehicle, an after-market downpipe is probably a fine idea. But in this particular case, I wouldn’t recommend it…at least not unless it’s backed with a great dyno chart and it’s been tested/used in a race setting.

      Personally, I don’t think I’d touch a GT-R. That car’s just about perfect. πŸ™‚

      Reply
      • john
        Aug 30 2015

        YES! Down-pipe for GT-R Is highly Recommended! Pain to install though.

        Reply
  2. Junior
    Nov 18 2014

    I have a focus St would i get any bhp gains by adding a downpipe ?already has a decat

    Reply
    • Jason
      Mar 3 2015

      Junior – Yes! After-market kits for the ST offer downpipes, upgraded exhausts, upgraded intakes, tuning, etc. LOTS of stuff you can do. Check out COBB and Steeda, to name two.

      Reply
      • Robert
        Sep 30 2015

        Just got a 2015 Focus ST, would you still recommend a turbo downpipe and catback?

        Reply
        • Jason
          Oct 5 2015

          Robert – I’d recommend a package from someone like Steeda.

          Reply
          • Robert
            Oct 7 2015

            Awesome! Thanks.

  3. TK
    Jan 9 2015

    I have a vw kombi TDI can I fit downpipe on it?

    Reply
  4. Amar
    Feb 10 2015

    I have a 2014 Audi A5. I want to make it louder…any suggestions? It is a lease, so I have to get it back to stock when i return the car, so I would just like to keep that in mind as well!

    Reply
    • Jason
      Mar 3 2015

      Amar – Buy a muffler, something sized for your vehicle. You can keep the OE muffler and re-install it when the lease ends. You can also invest in some electric cut-outs, but that might be too much noise.

      Reply
  5. Ryan
    Feb 15 2015

    What about a BMW M4? Twin turbo but already has a pretty good stock exhaust. Would you upgrade the downpipes ? I have Dinan tune on it so it has higher boost. I am just worried about it going into limp mode.

    Reply
    • Jason
      Mar 3 2015

      Ryan – Downpipe upgrades are a huge source of power for most vehicles. Check out EuroSportTuning.com – they’ve got a good selection of parts.

      Reply
  6. Dustin
    Mar 23 2015

    I have a Lancer ex GT-A 2010 model, is it right to put a downpipe? I want to make it louder, i already installed a muffler. I have no turbo tho.

    Reply
    • Jason
      Mar 23 2015

      Dustin – Can’t have a downpipe without a turbo. πŸ™‚

      Reply
  7. Joe
    Mar 27 2015

    I have a 2015 Subaru Forester XT. What kind of increase from a performance aftermarket downpipe would you say I’d see?

    Reply
    • Jason
      Mar 30 2015

      Joe – 10-20hp, 10-20 lb-ft of torque. If you combine it with a tuner, you might enjoy an extra 40-50 hp.

      Reply
  8. Joe Tahan
    Apr 7 2015

    I’m picking up my ’15 Evo x in about a week and i was wondering if a downpipe is a good idea for it. Once my finances even out after purchasing my new baby, id like to start tuning her. I’m headstrong on an ETS V2 exhaust and was wondering if its crucial to purchase a D/P along with it? if so, what are some companies you’d recommend?

    Reply
    • Jason
      Jul 20 2015

      Joe – Don’t have any recommendations for a company, but downpipes are generally a great investment for turbocharged cars, especially if they’re combined with a programmer that has a tune sepcific for your downpipe.

      I’d suggest finding a tuner, then figuring out what downpipes they have tunes for, and buying a downpipe that way.

      Reply
  9. Oliver
    Apr 10 2015

    2005 GTI, would a 60mm down pipe upgrade be a good idea for an otherwise stock car?

    Reply
    • Jason
      Jul 20 2015

      Oliver – Maybe. What’s the dyno chart look like from the downpipe manufacturer? Do they offer any claims and documentation?

      Reply
    • Robert
      Aug 2 2015

      A downpipe would really only be a benefit with a tune. An APR stage II plus the downpipe would give you a really nice gain without having to upgrade the stock turbo/intercooler/engine mounts/tires etc.

      I’m running a stage I with just an intake and the performance gain made it feel the way it should have been from the factory. I’m getting the DP and stage II flash in the next couple weeks. Dyno charts and plenty of youtube vids puts it quite comfortably faster than Mazda 3 Speeds and Focus ST’s for a really reasonable price.

      Reply
  10. Daniel
    Apr 26 2015

    Great article, great for someone new to cars. I have a 2010 BMW 535i x drive and am looking to add some efficiency to the turbo/engine through the exhaust. I checked out Eurosport Tuning you suggested earlier, but couldn’t find what I think I am looking for. Any suggestions you may have for that, or any other mods for this model would be great. Thanks πŸ™‚

    Reply
    • Jason
      Jul 20 2015

      Daniel – Beyond EuroSport Tuning, my best advice is to Google “BMW 5-series mods” and look for parts that have performance claims supported with dyno tests.

      Reply
  11. James
    Apr 27 2015

    Hi. I have a c250 petrol 2010 model. I’ve had a look at a few downpipes, but they they say they aren’t road legal? Any how, I’m thinking of upgrading the exhaust system. What benefits would I get home both of these? And it there anything else you’d recommend?

    Reply
    • Jason
      Jul 20 2015

      James – A lot of after-market parts are listed as “off-road only”, as doing so reduces the regulatory requirements associated with selling the parts. However, they’re fine for all use (only a visual inspection of your exhaust could cause you to fail an inspection…or not. visuals are kind of rare).

      I have no recommendations, but since you’re a Volvo owner, I know EuroSportTuning.com has a bunch of stuff.

      Reply
  12. Azri
    May 12 2015

    I have a 2.8L turbo-diesel Chevy Colorado, which i notice the design of the downpipe design is straight with minimal bends on each ends. By upgrading to a larger diameter downpipe with fairly same design as stock guarantees a noticeable response or gain in performance of my truck? thanks

    Reply
    • Jason
      Jul 20 2015

      Azri – Cool truck! We haven’t gotten those yet.

      Diesels generally respond best to tuners…the factory tends to tune them conservatively to minimize EGTs, but if you’re willing to roll the dice a little a tuner is really all you need. I don’t think you want to mess with the downpipe unless it’s part of a kit.

      Keep an eye on the products offered by Banks Tuning for the new Colorado…they’re diesel wizards. ATS is another company I’d monitor, as they have lots of parts for diesels.

      Reply
  13. Mike finger
    May 18 2015

    I have 2013 juke nismo. Installed an injen cold air intake. Had turbo manually increased a couple lbs. cat back exhaust. Next I was wanting injen intercooler pipes and turbo downpipe. Think that will do a lot for a little more hp? Also want to get some lowering springs. On the fence about a throttle body spacer. Any feedback on any of this would be very appreciated. Also any suggestions. Thanks Mike.

    Reply
    • Jason
      Jul 20 2015

      Mike – Throttlebody spacer is a gimmick. Don’t bother.

      The downpipe and upgraded intercooler can make a difference, but it’s all about the tuner…what brand of engine tuner do you have installed, and what tunes does that manufacturer offer for the mods you want to make? Answer that question and you’ll know what’s worth buying.

      Reply
      • Mike finger
        Jul 20 2015

        Thanks a lot for your returned email! I’ve already installed a downpipe, so no question there. As far as tuner, to tell you the truth a May have bought a gimmick already. Think it’s called a jdm stage 3? That plugs into cpu port under dash. I have contacted cputek, been given a quote for cpu upgrade. Would have already got it but it’s expensive. Any input on that? Thanks!

        Reply
        • Jason
          Jul 26 2015

          Mike – Nothing specific, other than to say you should require dyno proof before you buy. πŸ˜‰

          Reply
          • Mike finger
            Jul 31 2015

            Thanks Jason, it’s cool that you help newbies like myself.

        • Jason
          Aug 3 2015

          Mike – I like that it’s expensive – most of the good tuners are. πŸ™‚

          CPUTek isn’t a name I know, however.

          Reply
          • Mike finger
            Sep 6 2015

            Hi Jason, misinformed you months ago on name of flash. It’s ECUTEK. Anyway still plan on getting one when I get funds together. They send a disk (I think) and download from laptop. Have to buy a license for it. (?) Question today is. If I get ecu flash should I go back to standard turbo boost? Thanks man!

          • Jason
            Sep 7 2015

            Mike – Replied to your email.

  14. Jordan
    May 24 2015

    Just wondering what type of down pipe I should use? And how much hp gain I could see, I have a 2013 Hyundai Veloster turbo

    Reply
    • mason
      Jun 1 2015

      jordan – you could be looking at a little gain of 10 – 20 hp from some after market down pipes

      Reply
    • Jason
      Jul 20 2015

      Jordan – Whichever downpipe you can get that has dyno sheets to prove that it works. My guess is that you’re looking at one or two options once you require a dyno chart…

      But, like I always say, find an engine tuner first, then see what downpipe brands they have tunes for.

      Reply
  15. byron block
    Jun 2 2015

    I just bought a 2015 Audi s-8( twin turbo) and am installing an APR ecu,and a Meistershaft exhaust system. Will downpipes be worth the extra costs($ 1,700 or thereabouts)? Will the down pipes be significantly louder? The exhaust system will have electronically controlled valves .

    Reply
    • Jason
      Jul 20 2015

      Byron – In terms of being worth the cost? I don’t know. Usually they’re good for 20hp (or so), but on that vehicle they might do a little better.

      The downpipe won’t have a noticeable impact on sound, so that’s not a reason to get them (or not get them). Sounds like a fun car, BTW. Too bad street races are so hard to arrange at the country club, LOL. πŸ™‚

      Reply
      • Joseph
        Jul 6 2016

        Hahahahaha

        Reply
  16. GTi-Fan
    Jun 4 2015

    Hi there,

    I’m thinking about getting into tuning as a hobby. I’m not planning to race seriously or anything, but I do like to go fast. Right now I’m looking at a 2010 VW GTi and I wanted to know what are the best upgrades to go for while keeping my spending in check.

    I figured the exhaust, intake and coil-overs are the places to start (feel free to correct me if I’m wrong), but I wanted to know how much would I gain from a new down pipe if i’m not planning on upgrading the turbo anytime soon.

    Thanks,
    GTi Fan

    Reply
    • Jason
      Jul 20 2015

      GTI-Fan – Generally, modern cars benefit from the following:

      – engine tunes
      – exhaust and air intake kits
      – downpipes (if they’re turbo’d)

      and then from there we start talking about things like upgraded turbochargers, over-sized injectors, water-methanol/nitrous (again, if turbo’d), and then engine swaps.

      If it was me, I’d find a Golf R (assuming they offered one in 2010) and start there. You can probably go pretty crazy just modifying the turbo on that car…

      Reply
  17. Alan
    Jun 5 2015

    What about an Audi s5? Good idea to get an after market downside?

    Reply
    • Jason
      Jul 20 2015

      Why not? There’s nothing unique to an S5 that makes them a good or bad idea. The trick is to buy a good one, and as I like to say, any company selling performance parts needs to prove their product works on a dyno.

      Reply
  18. cyprian
    Jun 7 2015

    Hi there

    I currently drive a polo gti 6R ,l was wonder how would my car sound like if l had to put a downpipe and would it gain any power.

    Reply
    • Jason
      Jul 20 2015

      Cyprian – Gain power? Yes. Sound different? Probably not.

      Reply
  19. kyle
    Jun 22 2015

    would I notice a difference in performance and sound with a downpipe and decat on my golf 6 1.4 tsi

    Reply
  20. Yaseen
    Jun 25 2015

    I have a 1.4 Fiat Punto turbo…will a downpipe do any good? looking to make my car sound and look better. Any advice on mods i can do will be appreciated.

    Reply
    • Jason
      Jul 20 2015

      Yaseen – A downpipe can’t hurt, but I would advise you to look for a performance kit that includes a tuner, intake, exhaust, etc. Small engines like this don’t benefit as much from one component…you want a package.

      Reply
  21. PattyA14
    Jul 1 2015

    I’m looking at purchasing a 2009 Volvo C30 R. I already have an S60 R with a performance downpipe and notice a big difference. Do you know of there’s any options or how much power I would get out of the C30?

    Reply
    • Jason
      Jul 20 2015

      PattyA14 – Sorry, not much help on Volvo stuff. EuroSport Tuning has lots of Volvo parts, and Frank (the guy that runs the site) knows what’s up. Give them a call or email.

      Reply
  22. Mr. T
    Jul 28 2015

    Hi Jason,

    Excellent article and very informative indeed. I’m driving a Mazda 6 MPS (European version of Mazdaspeed 6). But, planning to replace it with 2004-2007 reg BMW 120d M sport since 2007-2010 apparently have had lots of engine related issues.

    What mods will get the 120d from 177 bhp to about 220 bhp? The Mazda 6 has very soft suspension and too big, don’t feel nippy at all. Mazda also suffers from blown engine due to weak VVT actuator and chain issue.

    Any suggest is much appreciated.

    Reply
    • Jason
      Aug 3 2015

      Mr. T – If you want to increase horsepower 30%, you’re looking at adding forced induction. Both turbochargers and superchargers increase output roughly 30% (sometimes more, sometimes less).

      If the vehicle already has a turbocharger, than you’re looking at some sort of turbo upgrade. Dinan makes all kinds of stuff for BMWs..I’d probably go see what they had in a turbo or supercharger.

      Reply
      • Mr. T
        Aug 20 2015

        Excellent tip Jason, thank you so much. I have decided to keep the Mazdaspeed 6. Thinking of buying JBR Power Path Stage 2 Short Ram Intake with Turbo Inlet Pipe and Autotech High Pressure Fuel Pump now.

        Hopefully the forced inductions will give the horse power from 256 to about 300!

        Reply
  23. yotam
    Jul 31 2015

    do you recomand downpipe and race exhust system for giulietta qv ?

    Reply
  24. Brent
    Aug 19 2015

    Just bought a ’15 Civic SI coupe, I just wanted to do a downpipe and a tune, are there brands you can recommend? Would it be better if I bought a full exhaust system? (does that include a downpipe?) Im a noob, thanks

    Reply
    • gee
      Mar 2 2016

      did you go through with this?

      Reply
    • gee
      Mar 2 2016

      What are your thoughts for a 2015 Civic SI Sedan? Ive seen you reply to almost all the other cars except the Civics. Any particular reasons? Your opinions are appreciated! thanks

      Reply
      • Jason
        Mar 7 2016

        gee – I like Civics quite a bit. I just don’t typically respond to questions like “how much will I gain”, because it depends on the parts installed. There are lots of aftermarket parts for Civics, particularly from the 90’s and early 2000’s. I’d go that route if I was building a fast 4-banger.

        Reply
  25. kevin
    Aug 24 2015

    I have a C300 2015 i4 Turbo charged. DO u think i should downpipe and does it increase much horsepower?

    Reply
    • Jason
      Sep 6 2015

      Kevin – Certainly possible, only I’m not sure anyone makes a good kit for the C300…it’s hard to find performance parts for brand new M-B models.

      Reply
  26. Patrick
    Sep 3 2015

    Hey I’m sorry this is so much later but I recently got a ’15 EcoBoost Mustang and I was wondering if you think I should get a catted downpipe for it?

    Reply
    • Jason
      Sep 6 2015

      Patrick – You’ll see some more power that way, but I’d suggest looking at one of the many “stage” kits. A combination of a downpipe, tuner, and intake should be good for quite a few horsepower.

      Reply
  27. Ryan 2.0t
    Sep 5 2015

    I have a 2014 genesis 2.0t how much performance would I gain if I decide to put an Isis Down Pipe? I already have a cat back and AEM cold air intake.

    Reply
    • Jason
      Sep 6 2015

      Ryan – Downpipes are usually good for 10-25hp.

      Reply
  28. Zaahir
    Sep 10 2015

    I own a Mini Cooper S. Was wondering if a downpipe would add more bhp to my car.

    Reply
    • Jason
      Oct 5 2015

      Zaahir – Is it turbocharged? Did you read the post?

      Reply
  29. John
    Nov 16 2015

    I have a 2014 BMW 335i. Twin-turbo pushing 225kw and 400nm torque at 1200rpm min. Would you recommend getting down-pipes ? what power increase would there be and any increase in sound ? ….What product brand is recommended as well ?

    Reply
    • Jason
      Nov 27 2015

      John – Downpipes are usually a good idea for turbocharged vehicles, as the OEM downpipes often limit performance for emissions reasons. Power increase can be just a few HP up to 50hp, depending on vehicle (your vehicle is probably only going to gain a few HP). There may be a difference in sound, but I’m not sure.

      As for brands, my advice is to shop EuroSportTuning.com – the guy that runs that site knows what he’s doing and only sells kits that make sense. Whatever they have available is what I’d look at.

      Reply
  30. Sandeep Sabhanayaka
    Nov 28 2015

    I have a BMW X5 3.0D would it increases my fuel economy and horse power, if so by how much do you think

    Reply
    • Jason
      Nov 29 2015

      Sandeep – The answer is too look at the specs given by the downpipe manufacturer. Most will share a dyno chart. I don’t believe you’ll see much in terms of fuel savings, but you should see a 10-40hp gain. You’ll also enjoy slightly snappier turbo response.

      Reply
  31. David
    Nov 29 2015

    I have a Cla250 v4 with a turbo. I already did a resonator delete. But I want it to sound a bit more aggressive. Would an aftermarket downpipe be good to the sound increase?

    Reply
    • Jason
      Nov 30 2015

      David – First, don’t say V4. That’s not a thing, unless you’ve got some 60’s era European car or a motorcycle.

      Second, downpipes don’t change the sound of the engine much, at least for everyone else. You may notice a different sound at WOT, but it depends.

      Reply
  32. msdoll
    Dec 2 2015

    I have an 85 Buick ttype turbo would a down pipe be useful nd how so

    Reply
    • Jason
      Dec 6 2015

      msdoll – Probably. Look at the dyno chart from the company selling the downpipe.

      Reply
  33. ash
    Dec 9 2015

    Need some advice…I got a golf 5 gti fsi 07 I’m installing a downpipe this weekend however I was advised that the EPC light might come on should I be concerned?

    Reply
    • Jason
      Dec 9 2015

      Ash – If you reflash the ECM to be compatible with your new downpip, you shouldn’t have any trouble.

      Reply
  34. Corey
    Dec 13 2015

    When adding a downpipe to a turbo engine do you also need to add an after market exhaust to benefit? Would an axle back exhaust and a downpipe add hp? I have a 2013 BMW 328 with M-performance exhaust (axle back).

    Thanks

    Reply
  35. Jason
    Dec 13 2015

    Corey – No, an after-market exhaust isn’t required. Also, if youv’e got the M exhaust system, don’t touch it. Nothing you can do will make it better.

    Reply
  36. Dean
    Dec 14 2015

    Any experience with a down pipe on a mini cooper S Turbo?

    Thanx

    Dean

    Reply
    • Jason
      Dec 16 2015

      No – sorry.

      Reply
  37. SAFS
    Dec 15 2015

    great post firstly
    i recently bought a golf 7 GTI
    I’ve been researching intake systems exhaust systems and downpipes
    could you recommend any particular brands that work well 7gti’s
    looking for great quality and extreme performance

    THANKS

    Reply
    • Jason
      Dec 16 2015

      No. EuroSportTuning is the company to talk to if you have a VW.

      Reply
  38. Gabriel
    Dec 21 2015

    i just bought a 2005 G35 an was wondering if i should buy an after market downpipe to it, and i also eanted to what exacly it would to it.. would it give it more sound? more hp? or wha

    Reply
    • Jason
      Dec 26 2015

      Gabriel – It makes your car go faster. How about reading the article before you comment next time?

      Reply
  39. Matt riz
    Dec 24 2015

    Jason you seem pretty knowledgeable that is why I’m writing this very XLT but with the new aluminum yes I know there are pros and cons but with it being so light I decided to make performance upgrades. I installed a high performance Rauch cold air intake I can honestly say it made a huge difference. I also installed and an MBRP High-performance exhaust it’s the solid black 2.5 inch dual cat back that comes out the back with 3.5 inch pipes I really do love it there is definitely a noticeable power upgrade and the sound is great it sounds good but not overly obnoxious. I am not familiar with programmers and tuners you seem to be but with these high-tech engines nowadays and the computer systems and tuners already in them I was afraid to mess with that so instead I got a 85 MM BBK throttle body high performance and I will tell you with The three of those Enhancements I know I’m getting somewhere between 30 and 50 hp. I would like to get your opinion on all this please feel free to criticize also your thoughts on a tuner and programmer for such a high tech engine and new engine thank you for your time I’m looking forward to hearing back from you and if you have any other ideas please feel free to share the only issue is I don’t want to buck my warranty and I’m almost positive that A tuner or programmer will it has a Lund grill guard with an LED strip and it’s a sharp looking truck I’m just not interested in putting headers on it or cylinder heads that’s just getting too much into technicalities I’d rather just focus on the airflow I try to tell people that want to make upgrades I think that is the easiest way to go to many people mess with the engine when all you have to do is find out all the ways you can to make your engine breathe better and you’re going to have noticeable results. With the and Hansons I made there’s definitely a noticeable improvement in acceleration but my mid range power is unbelievable as it was when it was stock as well. Will my trucks computer and tuner automatically adjust to these enhancements is another question I have I was told that it would. The only other question that I have lol is what are your thoughts on a high performance catalytic converter because that can make the biggest difference out of anything but with today’s emissions regulations I don’t know about it I was pricing them on line I’m on the fence about it I’d like your opinion Any other suggestions or ideas please let me know Jason thank you

    Reply
    • Jason
      Dec 26 2015

      Matt – First, thanks.

      Second, going in reverse order:

      a) High-flow catalytic converters only make sense when you’re supercharging or turbocharging something. Contrary to popular belief, modern catalytic converters aren’t constrictive whatsoever.

      b) A tuner won’t impact your vehicle in a negative way, and I’d encourage you to shop for them on AutoAnything.com to see what’s available. All you have to do is plug them into the vehicle diagnostic port, let them run their magic, and gain substantial power.

      c) I’m a bit surprised that the throttle body upgrade made much difference, but I don’t know the size of the unit you replaced. If you can get more air into the engine, good things happen. As for the air intake and exhaust, they sound like good pieces…only I worry the exhaust might be too big. I’m not sure what engine you have, so I can’t be certain.

      Reply
      • Matt
        Dec 26 2015

        The factory throttle body was a 57mm I got a bbk 85 mm…exhaust will fit fine it’s an MBRP cat back solid Black 2.5 inch pipes resonator and muffler dual exhaust…do you think I should get high peformance headers? And a throttle body spacer I found one that fits the bbk? Please shoot it to me straight cause I really don’t know the throttle body spacer I’m leaning no….can’t wait to get your opinion…please explain a little more about a tuner I looked at a 600$ called Diablo….problem is I heard they ruin your warranty and Lower the life of ur engine let me know bud?

        Reply
        • Matt
          Dec 26 2015

          Engine is a 5.0 v8 coyote 385 hp 387 torque.

          Reply
          • Jason
            Dec 26 2015

            Matt – Throttle body spacers don’t do anything on a modern fuel injected vehicle. In the old carbureted days, a spacer between the carb and the intake manifold was a good add (depending on how your carb was tuned). In the days of throttle body injection (earliest fuel injection days), it may or may not have been impactful (depends on the vehicle). But today, a little bit of extra air space between the throttle body and X isn’t going to matter.

            As for engine tuners, they essentially overwrite the factory fuel map. The OEM fuel map will call for X amount of fuel when Y = this and Z = that. The OEM fuel maps are designed to offer a good balance between performance, fuel efficiency, and emissions. If your over-write them with a fuel map that is more aggressive, you’ll trade some emissions and lose a bit of fuel efficiency (in some scenarios) in exchange for sizable horsepower increases.

            If someone tells you that one of these tuners can void a warranty, they are misinformed and probably working for a dealership. Dealers often parrot this line, because it’s the easiest way to discourage performance enthusiasts from visiting a dealership’s shop.

            Don’t believe it.

          • Matt
            Dec 26 2015

            Thanks for all your help Jason sincerely

  40. Bill Biddinger
    Dec 30 2015

    i have a 2007 chevy silverado 3500 dually diesel all stock would a down pipe do any thing for my truck

    Reply
    • Jason
      Dec 30 2015

      Bill – Yes. Read the article. Look for a downpipe that offers dyno proof.

      Reply
    • Bill Biddinger
      Dec 31 2015

      i found a down pipe with dyno test it is wrapped with heat tape is there any advantage to that

      Reply
      • Jason
        Dec 31 2015

        Bill – Perhaps. The tape usually exists to protect other components from the heat the pipe puts out, so my guess is that it makes no difference performance wise.

        Reply
  41. JT
    Jan 22 2016

    Hey!

    I have a 2015 Subaru Forester xt with a cobb accessport running the stage 1 93 oct map. I’ve recently installed a Nameless Performance cat back exhaust system. I’m considering installing a Nameless Performance downpipe with which I’d get a custom pro tune. What kind of hp/trq gains would you expect to see over where I am now?

    Reply
    • Jason
      Jan 23 2016

      JT – Hard to say. 20hp seems like a good round number.

      Reply
      • JT
        Jan 24 2016

        Do you think adding a Cold Air Intake like an AEM would be beneficial to the setup I previously mentioned? I imagine that since I’ve reduced the exhaust restrictions as much as I can it would help to get more air into the engine?

        Reply
        • Jason
          Jan 24 2016

          Probably a little bit. Turbocharged vehicles probably won’t benefit as much as NA, but freer breathing is freer breathing.

          Reply
  42. Singh
    Feb 5 2016

    I have a 2015 Mustang EcoBoost. How much of a difference will it make if I get an aftermarket downpipe?

    Reply
    • Jason
      Feb 5 2016

      Singh – What does the company that sells the downpipe say? Do they provide proof of some kind (like a dyno chart)?

      There are lots of companies selling kits for EcoBoost engines, and I’m sure there’s a kit for your Stang. But you need to research the kits that are available for yourself. They’re not all the same.

      Reply
  43. Mike
    Feb 7 2016

    I have a 2006 Subaru Liberty 2.5i (Legacy for those outside AUS.)
    Would it be worth upgrading to a high flow catalytic converter, aftermarket fuel pump and larger down pipe?

    I really would like better performance out of the car but am struggling to think what else I can do to improve performance keeping in mind I wish to keep the car naturally aspirated.

    Reply
    • Jason
      Feb 8 2016

      Mike – Generally, high flow catalytic converters are only necessary when you add a supercharger or turbocharger to an engine that was naturally aspirated. Also, downpipes are only found on turbocharged vehicles.

      If you want to increase the power of your 2.5L, you want to look at an air intake, an exhaust kit, and an engine tuner/programmer.

      Finally, fuel system upgrades like larger injectors and high perf. fuel pumps tend to make very small differences on street cars. I wouldn’t mess with any of it unless you decide to add a turbo.

      Reply
  44. Rahsean St.Louis
    Feb 20 2016

    I have a 2015 Ford Focus Ecoboost and I wanted to do some minor upgrades to get a little more power out of it. What would you recommend?

    Reply
  45. Richard
    Feb 26 2016

    I have an 08 mazdaspeed 3, have a cobb v3 accessport with a front mount cp-e intercooler system. I am planning on getting an after market exhaust and downpipe, was wondering which you recommend getting first and how much on average the hp gain would be.

    Reply
    • Jason
      Mar 7 2016

      Richard – No recommendation beyond Flowmaster, Borla, or Magnaflow.

      Reply
  46. Ted
    Apr 6 2016

    Have a 2012 Audi A3. 2.0 L Trying to get it tuned but having computer issues…How much would a down-pipe help?

    Reply
  47. Tony
    Apr 15 2016

    I have 435i bmw replacing the downpipe will it make a difference in performance

    Reply
    • Jason
      Apr 20 2016

      Tony – Probably. See the comment I left Brett.

      Reply
  48. Brett
    Apr 20 2016

    Toyota JZX90 1JZ-GTE? worth adding aftermarket downpipe?

    Reply
    • Jason
      Apr 20 2016

      Brett – Probably. Depends on the pipe. My standard advice is to find one that comes with dyno charts to show how much power it adds (and where).

      Reply
      • Brett
        Apr 20 2016

        Thanks. Apparently the stock ceramic twin turbos can safely take up to 14psi. Stock is 8psi. Ive changed the air intake and de-catted and big diameter exhaust – its now boosting to 12psi. When i look at the skinny downpipe in front of my 3in decat pipe it makes me want to upgrade it. I will do more research. It seems theres a Japanese made apexi item that will bolt in.

        Reply
  49. miles
    Apr 22 2016

    i have a nissan 300 zx twin turbo and i was wondering if a down pipe would actuality help with my peak HP

    Reply
    • Jason
      Apr 22 2016

      Miles – Probably. See previous comments.

      Reply
  50. Pamela
    Apr 22 2016

    I have a 2007 bmw 328i i want to make it louder..
    Any suggestions ..?

    Reply
    • Jason
      Apr 22 2016

      Pamela – New muffler?

      Reply
  51. gregg
    Apr 23 2016

    I have a 2016 wrx. would a downpipe benefit me if i do not upgrade anything else at this moment in time?

    Reply
    • Jason
      Apr 24 2016

      Gregg – Yes.

      Reply
  52. DC
    Apr 23 2016

    Hi I have a Subaru Forester 2015 xt what kind of downpipe kit do you recommend me for improve hp, if you give me a brand and type you will be helping me a lot thanks

    Reply
    • Jason
      Apr 24 2016

      DC – I don’t recommend a brand – it depends on the vehicle, and there are a lot of options. See the other comments.

      Reply
  53. Jonathan Stubbs
    May 10 2016

    Hi i am looking at getting a new 3″ performance downpipe with flex for my 2013 Hyundai Santa fe 2.0t.

    Would i need to tune my car? how much hp could i gain?
    And i was also looking at replacing the cat with a tube made to replace. both parts are for the same engine genesis coupes.

    Reply
    • Jason
      May 12 2016

      Jonathan – Don’t know how much hp you will gain. I’d suggest asking the company that sells the downpipe for a dyno chart showing the improvement. As for tuning, it’s a good idea.

      Replacing the cat+the downpipe all together isn’t a bad idea. However, most cats aren’t very restrictive these days…unless you’re increasing the boost level, I’d say that the OEM cat is fine.

      Reply
  54. Carlos Marino
    May 17 2016

    Hi,

    I drive a 2.0T Audi A4 and was looking for a mod to increase the volume of the exhaust and also a little bit in power but more for sound improvements

    Any recommendations?

    Thanks

    Reply
    • Jason
      May 17 2016

      Carlos – Most 2.0T Audi owners find that a tuner, intake, downpipe, and exhaust all add power. You might check out some of the performance packages that are available too. I like EuroSportTuning.com, but there are other sites that sell this stuff too.

      Reply
  55. DavidD
    May 18 2016

    I have an 08 Legacy GT. The first cat was failing and went with an Invidia catless downpipe. I don’t know what HP gain I got from that, but with a Dyno tune… I went from 237.6ft-lb of torque and 215.6Hp at 4950 RPM to 257.5 ft-lb of torque and 237.2 Hp @5250 RPM.

    Reply
  56. karim
    Jun 3 2016

    i am in the process of changing my exhaust to a brand called miltek from uk. are they popular for their quality and design

    Reply
    • Jason
      Jun 5 2016

      Karim – Yes. That’s a well-known brand name.

      Reply
  57. Raymond
    Jun 7 2016

    Hi i have a 2016 polo gti 6R 6speed manual, i would like to find out what modifications can i add to make the exhaust sound more louder.any suggestions?

    Reply
    • Jason
      Jun 20 2016

      Raymond – Upgraded muffler. Cat-back exhaust.

      Reply
  58. Graham
    Jun 14 2016

    Hello Jason,

    I bought a 2007 Subaru Liberty GT wagon a few months ago completely stock. (I believe the ej255 engine is brilliant, it just needs to breathe)
    So far I’ve purchased a new silicone intake and MAF Pipe. The plan is to replace the up pipe with a catless pipe as it has a second cat further down the system. I was also considering replacing the down pipe, until reading this article of course… ? now I intend to.
    I don’t want it too noisy so I’d be hesitant to replace anything else. I’m open to suggestions on this.
    Once this is complete, I will be getting it tuned. First time I’ve seen the term ‘tuner’ before, I’m guessing it’s a kind of ‘off the shelf tune’ software plug-in, whereas tuning at a shop with a Dyno is more of a calibrated approach?
    Would you mind recommending which direction on tuning I should go for this, I wouldn’t know where to start.

    Thank you for your time,

    Graham

    Reply
    • Jason
      Jun 20 2016

      Graham – I don’t have any specific suggestions, but I’m not wild about going to a tuning shop unless you’ve got a really unique setup. Instead, you should buy a tuner that’s compatible with your vehicle – COBB Tuning has some good options – and then talk to them about a custom map for your setup.

      Reply
  59. Adam
    Jun 26 2016

    Hey guys I have a 118d Msport. Already remapped to roughly 170hp. Was wondering if a downpipe is worth getting?

    Reply
  60. PHILLIP
    Jul 4 2016

    I have a 2015 Chevy Malibu ls 2.5l eco…. I put an exhaust and cold air intake…. Would a down pipe/front pipe make my car faster (more horsepower)?? I also installed the turbunator fan inside the air intake and a remapping tuner chip…. Thanx!

    Reply
    • Jason
      Jul 4 2016

      Phillip – I wasn’t aware that the 2.5L had a turbo.

      Reply
  61. Vagg
    Jul 10 2016

    I have alfa romeo mito tb 120hp and I have 2 questions: 1)Will I get some hp increase and sound? 2) will the check engine light open If I put aftermarket downpipe? I think if I change it my car will be decat right?

    Reply
    • Jason
      Jul 21 2016

      Vagg – In order:

      1. Maybe. Depends on what system you add. Sound is all but certain, hp is going to depend on the quality of the system.

      2. Maybe. If the pipe is correctly designed, and/or installed by someone that knows how to re-tune the engine, it shouldn’t be a problem.

      Reply
  62. Azhar
    Jul 23 2016

    BMW M2 and Downpipe..
    Hi Jason, I’m picking up an M2 F87 next week. Would you recommend the downpipe?
    Azhar

    Reply
    • Jason
      Jul 27 2016

      Azhar – Sorry, I don’t have a recommendation. My advice is to only look at parts that have proven dyno performance.

      FivestarMotorsport.com is probably a good resource for you as well. Talk to Chris – I’m sure he’ll help you out.

      Reply
  63. Sean.milchan@pb.com
    Jul 26 2016

    I have a 15′ sl63 with a ecu upgrade from Renntech. I’ve been thinking abut doing the next thing. After speaking to a few different companies I’m confused so I’m glad you have this forum so I can get independent input. One of the companies says to the muffler because it offers more horsepower than the down pipes with a 200 Cell. The other one says this makes no sense; downpipes will give much more power increase.

    Reply
    • Jason
      Jul 27 2016

      Sean – When you’ve got a high-end car like an SL63, the normal rules don’t really apply.

      First, understand that a lot of the addons and accessories available for your car will probably set a check engine light. High end cars are notoriously finicky, so you really need to talk to someone who knows your vehicle.

      Second, it’s usually best to buy a package of parts at once rather than go one piece at a time. This way, you can make sure all the parts play well together.

      My advice: Talk to Chris at Fivestar Motorsport (http://fivestarmotorsport.com/). He’s very experienced with high-end cars, and he knows all the options on the market. He can tell you what to buy, and he can give you a good deal too.

      Reply
  64. sean.milchan
    Aug 14 2016

    Thank you. I will do this.

    Reply
  65. aiden
    Aug 15 2016

    I Just bought a 2002 gti mk4 and it already has a few things like catch can bov and a turbo back exhaust should i buy an aftermarket turbo downpipe? If so what kind?

    Reply
    • Jason
      Aug 16 2016

      aiden – A downpipe can be a great add-on, and as far as brand I don’t have a strong recommendation. I’d suggest emailing or calling EuroSportTuning.com. They are VAG experts.

      Reply
  66. Adrian r
    Aug 24 2016

    I have. Ecoboost 2016 mustang ive done some onterior done like intercooler, intake, bama tunning, and have this thing called pedalmax on my car but ive been reccomended alot to install the downpipe on my car but id want to know how much hp it would go up if i did and what kind would best fit my type of car, and also are their any effects that can be caused?…. Thanks

    Reply
    • Jason
      Aug 25 2016

      Adrian – A downpipe is usually good for 20hp (sometimes more, sometimes less). The downsides are cost, emissions (your car might not be compliant any longer), and the chance that you’ll have to deal with check engine lights (depends on what kind you get).

      I’d advise going with a unit from a well-known company like Cobb tuning. It’s not the cheapest option on the market, but they’re a real manufacturer with engineering, testing, etc. The quality is good.

      Reply
  67. Jack Michie
    Sep 4 2016

    How much do you reckon it’ll cost me to get a downpipe fitted on a abarth punto grande and how much bhp do you think it will add on to it?. Thanks

    Reply
    • Jason
      Sep 5 2016

      Jack – Don’t buy a downpipe unless the manufacturer provides a HP increase estimate and a dyno chart.

      Also, I’d suggest looking for a kit that includes a tuner along with a downpipe. Downpipes usually require a custom tune.

      Reply
  68. john
    Sep 4 2016

    or you could just buy an AMG and all your problems will fly away.

    Reply
  69. Nate
    Sep 8 2016

    I have a 2011 Genesis coupe 2.0t stock, is there anything else I’d have to modify or change if I buy a downpipe

    Reply
    • Jason
      Sep 8 2016

      Nate – Depends on the downpipe you buy, but generally speaking you don’t want to add a downpipe without having an engine tuner (or getting the engine tuned by a pro).

      Reply
  70. Chris
    Sep 25 2016

    I have a 3.2 Audi A5 and I installed a AWE track edition exhaust. Love the way it sounds but I want more. I’ve heard of removing the downpipe but not sure if that’s correct. What are my options for more hp and aggressive sound ?

    Reply
    • Jason
      Sep 25 2016

      Chris – My concern with removing the downpipe is that the turbo is almost certainly going to run hotter. It might burn up much sooner than expected.

      Of course, if you were looking for a good reason to replace the turbo anyways, premature failure isn’t a big ideal. But it you don’t want to worry about the turbo failing, I’d suggest leaving a downpipe in place.

      Having said all of that, talk to EuroSportTuning.com. Frank knows an encyclopedia more about VAG cars than I do.

      Reply
  71. Kanda
    Sep 25 2016

    Hi Jason, i have a hyundai tuscani 2.7 v6. Would you recommend the downpipe? Thanks, Great Article btw

    Reply
  72. Jason
    Sep 26 2016

    Kanda – Unless you’ve bolted a turbocharger onto your 2.7L Tuscani, I do not recommend a downpipe. πŸ™‚

    Reply
  73. Emmanuel
    Sep 27 2016

    I own a 2016 audi a5 35tfsi if i put a down pipe how many horsepower do i gain ?

    Reply
    • Jason
      Sep 27 2016

      Emmanuel – See the other comments here asking the same question. HP is going to vary by the pipe, look for a dyno chart, talk to Frank at EuroSportTuning, etc.

      Reply
  74. Eric Schmidt
    Oct 9 2016

    I just bought a 2016 all wheel drive 2.0 turbo infinity q50. I don’t have exhaust and my cold air intake will be here any day along with an upgraded computer system. Would getting down pipes be a large gain or will it be minimal without an exhaust system?

    Reply
  75. Tammy
    Oct 15 2016

    Hi I bought a hyundai veloster street turbo and was wondering what I can do to get the best performance and economy wise from my car

    Reply
    • Tammy
      Oct 15 2016

      Sorry 2016 model

      Reply
  76. Aaron
    Oct 16 2016

    I have a 2006 Subaru Outback xt what kinds of gains could I get out of a Dow pipe?

    Reply
  77. S
    Nov 2 2016

    Hi

    Thinking of installing a downpipe to a 435i model 2014. Currently have bmw software upgrade. How much power would gain from the downpipe.

    Reply
    • Jason
      Nov 5 2016

      S – What downpipe are you buying? What tuner do you have? Is there a custom tune available for your vehicle with a downpipe to match the one you bought?

      If you’re looking for a rough number, figure 20hp. If you’re looking for the exact figure, you’ll need to contact all the companies involved and ask them.

      Reply
  78. Sunny
    Nov 12 2016

    I have 86 Corolla 1.6 efi. Should I get a downpiping installed?

    Reply
    • Jason
      Nov 13 2016

      Sunny – Probably not, unless your Corolla has a turbocharger that I don’t know about.

      Reply
      • Sunny
        Nov 14 2016

        No it doesn’t. Thanks

        Reply
  79. Juan martinez
    Dec 16 2016

    I have a 2016 Hyundai Sonota sport 2.0t what will be my gains if I purchase a aftermarket downpipe? I already have a exhaust system & aem cold air intake & throttle body spacer…. thank you in advanced I hope I could get a clear answer the downpipe will be my next big purchase

    Reply
    • Jason
      Dec 29 2016

      Juan – Usually a downpipe is good for 10-20hp, but it can be quite a bit more on some applications. I’d suggest looking for an aftermarket unit that comes with a dyno chart.

      Reply
  80. Ashley
    Dec 20 2016

    I have a 2010 Hyundai Genesis 2.0t.. would buying an aftermarket downpipe to make it louder/increase hp be a good decision?

    Reply
    • Jason
      Dec 29 2016

      Ashley – A downpipe will probably make your engine sound a little throatier under hard acceleration, but most people like that. It would definitely boost horsepower, only the amount varies based on the pipe and your vehicle.

      My suggestion would be to invest in a programmer first, and to make sure the programmer has a compatible tune for whatever downpipe/exhaust upgrade you decide to make. That will help you get the most bang for the buck.

      Reply
  81. Papi
    Dec 27 2016

    Morning Jason and all, I have golf six gti manual, this car was fitted downpipes, the car is misfiring, loosing power, engine light on, black smoke behind, I’ve changed minicat, replaced plugs, cleared faults, VW claim that my turbo is fine, who can help me out pls inbox me on my email. Thanks

    Reply
    • Jason
      Dec 29 2016

      Papi – No idea. Internet diagnosis is hard. My guess is that it has something to do with oxygen sensors, but that is merely a guess.

      Reply
  82. Sergio
    Jan 11 2017

    Hey Jason. I recently got a JCW Mini 2011 (211hp) with the N14 engine (less pops and burbles).
    I wonder if an aftermarket downpipe would give me a few more hp and also nice pops and burbles,

    Reply
    • Jason
      Jan 11 2017

      Sergio – Definitely more hp, maybe not on the pops and burbles…only it will sound nicer at wide open throttle for sure.

      Reply
  83. pete
    Feb 10 2017

    I have a car but I think there’s no turbocharger ? I just got 2008 Mitsubishi lancer es from my brother and I want to change the exhaust system, should I get the downpipe as well ?

    Reply
    • Jason
      Feb 11 2017

      Pete – If you don’t have a turbo, you don’t need a downpipe.

      Reply
  84. Venoy morgan
    Feb 18 2017

    I have a 2009 335i, would you recommend downpipes and about how much ho would I gain

    Reply
    • Jason
      Feb 18 2017

      Venoy – I’m sure there’s a kit out there that would increase power on your 335i with a combination of a downpipe, tuner, intake, and perhaps some oversized injectors. My advice is to look for a combo performance kit.

      If you just want a downpipe, look for one that comes with a dyno chart showing the expected performance increase. Usually, they add 10-20hp by themselves.

      Reply
  85. Mike
    Mar 13 2017

    I have a 2011 F150 Platnium with the EcoBoost (turbo). I have been reading that changing the down pipe to a catless version may clear a P0430 code I am experiencing. Do you feel this is correct? The entire engine and exhaust is stock and the code appeared about 4 months ago and has been coming on and off with the engine light.

    Reply
    • Jason
      Mar 14 2017

      Mike – I don’t know specifically about that P0430 code, but it sounds like something related to an emissions system error. However, generally speaking, removing a catalytic converter doesn’t solve emissions problems. It can also make your vehicle less likely to pass a smog test.

      Unless you want a downpipe to save power, there are some ‘cheater’ adapters that can trick O2 sensors into reading “OK” even when the cat isn’t working. That might be the cheapest way to get that code cleared. Just understand that it might not be legal in your state. πŸ™‚

      Reply
  86. Yasser
    Mar 26 2017

    Hi Jason, I have a 2016 Nissan Patrol (Hardtop – 2door) 4.8L V6 (280bhp) WITHOUT Turbo… but would still like to get some extra punch. Do you think a Cold-Air intake and ECU remap would be enough? Or do you suggest entertaining the idea of Headers and Cat-back exhaust (with stock muffler for legalities) ?? Or do you suggest something completely different? πŸ™‚

    Reply
    • Jason
      Mar 31 2017

      Yasser – Yes – an ECU remap is usually good for 20hp or so, and a cold air intake will give you a little more. Throw an exhaust in (or maybe just a muffler upgrade) and you’ll have something that’s a little faster than stock.

      Reply
  87. Sam faz
    Mar 31 2017

    I have an E63s 2014 Amg.
    My factory warranty is up and I want to make the exhaust louder. I wanted to know which one is better:
    -Meisterschaft
    -FI Exhaust
    -Renntech
    -Alpha AMS

    What will downpipes do for me in this instance?

    Reply
    • Jason
      Mar 31 2017

      Sam faz – I don’t have any opinion on these brands, all I advise is that you buy a kit that comes with proven performance via dyno testing. Most companies will provide a sample dyno test along with their product – if you can’t see one of these dyno charts from the manufacturer, I wouldn’t buy.

      Also, downpipes are always good for more power on a turbo. However, since you have the AMG package, I’d guess that you don’t need to spend money on a downpipe. I’m not sure you need to spend on an exhaust either, to be honest. They come pretty fast out of the box.

      Reply
  88. Nick
    Apr 21 2017

    I have a 2014 535i msport bmw twin turbo. I’m looking to change the down pipe but not sure what to go with. I love the sound of the turbo spooling and also want to hear the blow off so I’m sure gonna have to change that as well. What type of set up would you recommend?

    Reply
    • Jason
      Apr 21 2017

      Nick – I’d suggest contacting EuroSportTuning.com and asking for Frank. He knows all about the European stuff, which brand(s) are best, etc.

      Reply
  89. maqhawe
    Apr 27 2017

    i have a polo tsi an i want to put downpipe
    is it a wise choice?

    Reply
  90. Nick
    May 24 2017

    2017 WRX. I just purchased the car and was thinking of doing this first. Any idea of the gains?

    Reply
    • Jason
      May 25 2017

      Nick – If you go with a whole setup that includes a new downpipe, I bet you could pick up 20-30 hp. If you just do an axle back, 5-10hp.

      Reply
  91. Lawrenson
    Jun 1 2017

    I have a jdm 1997 subaru forester. What kind of gains can I expect if I put an aftermarket downpipe?

    Reply
    • Jason
      Jun 2 2017

      Lawrenson – Cool! 10-20hp, give or take. Most downpipe manufacturers will provide dyno charts to show sample gains.

      The real trick is to combine a downpipe with an intake, a new exhaust, and a tuner…that’s good for 50-75hp when it’s all said and done. Upgraded turbo works too – Cobb has some cool stuff.

      Reply
  92. Michael
    Jun 5 2017

    Hello. Recently bought a used Alfa 159 2012 – 1.8turbo. Please advise what downpipe you would recommend and where to purchase one? Thanks for your time

    Reply
    • Jason
      Jun 9 2017

      Michael – Sorry, no idea. Look for a company that offers a dyno chart before you buy.

      Reply
  93. Tyler
    Jun 16 2017

    I have a BMW f21 116i would a new downpipe be a wise option?

    Reply
    • Jason
      Jun 16 2017

      Tyler – They usually increase power and torque, especially when combined with a tuner and some other upgrades. But is it wise? If you have the money to spend, sure. If not, then no. πŸ™‚

      Reply
  94. Jamie fitz
    Jul 1 2017

    I’ve just bought a 2013 seat leon 1.6 tdi copa
    Comes stock at 105 bhp I’m having a bluefin remap next week which will send it to 155 bhp with a massive torque return too.
    Would a downpipe make much of a difference for me? Any info appreciated as I’m not by any means a petrol head…
    What little things can I do to increase performance etc..

    Any info greatly appreciated.

    Reply
    • Jason
      Jul 2 2017

      Jamie – Downpipes usually add 10-20hp, so while it will have an effect, it won’t be nearly as great as the remap. If you have the funds and want a little more power, it’s as good an add-on as an exhaust or air intake upgrade.

      Beyond a tuner/remap, exhaust, and air intake, you can look into methane/water injection systems if you have a diesel. But I don’t know that I’d recommend that.

      A new, upgraded turbo might be a better place to spend your money…

      Reply
  95. Ryen
    Jul 15 2017

    Will a downpipe make a big difference on a 2014 Astra opc?

    Reply
    • Jason
      Jul 17 2017

      Ryen – Maybe. What does the dyno sheet from the manufacturer of the downpipe you’re looking at say?

      Reply
  96. Chanie
    Jul 17 2017

    If i put a downpipe on a 2004 golf 5 tdi, will it go into limp mode ?

    Reply
    • Jason
      Jul 17 2017

      Chanie – It could. The trick is to make sure the downpipe is installed correctly, and/or that you have the proper tune.

      However, the best company to ask about this is EuroSportTuning – they know all about performance options for VW. You might give them a call.

      Reply
  97. Jul 25 2017

    I get a Mitsubishi 3000GT VR4 1992 it has bi-turbo
    What would be best for get a reacher sound and different.
    Do you think it’s possible for it sounds like the La Ferrari ? I know I’m asking too much kkk my car is a V6 turbo. Or maybe I just should ask for it sounds better. Thank you.

    Reply

Trackbacks & Pingbacks

  1. What Smaller Engines Mean For Exhaust Systems – Clio 200 with Milltek Sport Exhaust | Exhaust Videos

Share your thoughts, post a comment.

(required)
(required)

Note: HTML is allowed. Your email address will never be published.

Subscribe to comments