The F30 N55 series platform of the BMW 335I and 435I turbocharged engine is just as amazing to tune and gain performance like its predecessor, the E90 | E92 335I. With any turbocharged vehicle, get the turbos to breathe better before and after them is the key to achieving more power with additional tuning. One of the biggest “corks” in an exhaust system of a turbocharged car is the downpipe. For emissions purposes, factory catalytic converters and downpipes can be restrictive. For racing and street applications or those looking to maximize their performance, a catless or high flow catted pipe with larger diameter piping will allow the exhaust gases to flow freely. The Agency Power catless/catted downpipes for the F30, F32, F33 BMW do just that. Its straight through design offers no restriction. It features CNC precision cut v-band flanges that work with the OEM components. With the catless race pipe, check engine lights can occur if you do not have proper tuning in place to change these limits. The downpipe in addition to a full exhaust system can sometimes yield 0.5-1.0psi of boost creep depending on the ambient termperature. Made in the USA, the all stainless steel pipe is hand TIG welded in a fixture for perfect fitment, every time.

Catted High Flow Downpipes

Catless Race Downpipes