Downpipe Bmw 320i F30
By the Editorial Staff
March 16, 2026
The downpipe carries exhaust gas from the hot side of your turbo to the rest of the exhaust system. Replace a faulty catted downpipe with an OEM downpipe or upgrade for more performance with our selection of aftermarket performance downpipe options. An N20 downpipe upgrade is the first hardware upgrade every N20 owner should invest in.
Upgrading your downpipe unlocks the most power, increases turbo spool, allows you to run stage 2+ tuning, and improves the exhaust note of your N20 powered BMW. BMW introduced a new valvetronic, single turbo version of its direct-injection engine for the F-Chassis models beginning in 2012. The Active Autowerke N55 downpipe for the M235i, 335i, 435i and M2 helps unleash some of the potential that is restricted by the OEM downpipe.
Downpipes used to only apply to aftermarket turbo builds for BMWs, but are now found on all modern BMW turbo engines. The downpipe attaches to the turbo and begins the exit flow of exhaust gases. This little bit of factory BMW exhaust piping leaves HUGE room for impressive power gains.
We've got the highest quality, result. Give your 2016-2019 BMW 320i/330i/420i/430i a facelift with these Downpipes from us! Perfect fitment and High quality these Downpipes will not disappoint. BMW F30/F31/F34 4" Catless Downpipe - Straight Pipe Design for Maximum Flow, Horsepower Gains & Aggressive Exhaust Sound Fits 3 Series Sedan, Touring & GT 320i / 328i Models with N20/N26 2.0L Turbo Engine (2012-2016).
The ARM Motorsports N20 Downpipe is the best hardware upgrade to get the most power from your 320i or 328i. The N20 has a stock downpipe with a catalyst that drastically restricts exhaust flow. The ARM N20 Downpipe features two O2 sensor bungs to allow for reinstallation of the OEM oxygen sensors.
An tune or CEL Delete will be required to avoid a check engine light from displaying on instrument panel. By reducing the back-pressure on your turbocharger, the ARM N20 Downpipe prepares your 320i / 328i for higher boost tunes. The ARM Motorsports N20 Downpipe is the best hardware upgrade to get the most power from your 320i or 328i.
Similar to it's brother the N55, the N20 has a stock downpipe with a catalyst that drastically restricts exhaust flow. This limits not only the amount of power N20 can make on the stock tune, but also prevents upgrading to a stage 2 tune due to excessive back. Description This 4" Turbo downpipe perfectly fits 2012+ BMW F30 N20 motors.
It is made out of Stainless Steel and T.I.G. welded, with stock turbo or an aftermarket turbo using the stock V-Band Clamps. The most restrictive part of any exhaust system is the catalytic converter, it is a potential performance restrain.
Downpipes eliminate the stock catalytic converters and reduce exhaust back.