CALL G
CALL G
The downpipe is the first section of pipe after the turbo. On a turbocharged car it's the single most restrictive part of the exhaust, which is why it's the one part that actually moves the power number.
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A cat-back changes sound. A downpipe changes how the turbo breathes.
Factory downpipes are narrow and packed with a dense catalytic converter, because they're built to light off emissions fast and cheap. Opening that section lets the turbo spool sooner and hold boost with less backpressure.
On most modern turbo platforms this is a real gain, not a rounding error. It's the reason downpipes are usually the first thing a tuner asks about.
A high-flow catted downpipe keeps a catalytic converter in the system, just a less restrictive one. This is what we recommend for any car that lives on the street. You get most of the gain and the car stays legal to drive.
Catless downpipes and test pipes remove emissions equipment. Under the federal Clean Air Act that makes them off-road and track use only. We build them for race cars and dedicated track cars. We will not tell you it is fine for your daily driver, because it is not.
If you're not sure which side of that line your car is on, call and ask. 954 708 6039.
This is the part people skip and regret. Changing the downpipe changes what the oxygen sensors see. Without a tune you're looking at check-engine lights and an engine computer fighting the new hardware.
Get the tune sorted as part of the plan, not after. We'll tell you straight if the combination you're describing needs one.
BMW N54, N55 and B58 — 335i, 435i, M240i, M340i. Volkswagen and Audi 2.0T, Golf R and GTI. Subaru WRX and STI. Mustang EcoBoost. Civic Type R. Diesel trucks.
If your platform isn't on that list it doesn't mean we haven't done it. Text the car and we'll tell you what we've built for it.
It depends entirely on the platform, the turbo and the tune. On many modern turbo cars a high-flow downpipe plus a matching tune is one of the bigger gains available per dollar. Anyone quoting you an exact number without knowing your setup is guessing. Call with your car and we will give you a realistic answer.
A high-flow catted downpipe usually will not, especially with a proper tune. A catless setup almost always will unless the tune addresses it. This is why the tune is part of the job, not an afterthought.
No. Removing a catalytic converter from a street vehicle violates the federal Clean Air Act, and Florida law follows federal emissions requirements. We build catless pipes for off-road and track use only. For a street car, ask about high-flow catted.
Yes. Bring the part. If it does not fit right we will tell you before we start rather than forcing it and leaving you with a leak.
Turbo car? Tell us the platform and what you're chasing. Just Call G. 954 708 6039.
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