Active Autowerke BMW N55 F3X M235I 335I 435I F87 M2 Aflow Catted Downpipe

Active Autowerke BMW N55 Downpipe NO PERFORMANCE TUNE NEEDED. NOTE: Fitment applies to US model cars only unless specifically stated. We cannot guarantee fitment to non-US model cars. BMW introduced a new valvetronic, single turbo version of its direct-injection engine for the F-Chassis models 2014 and up. 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. Turbochargers are powered by spent exhaust gases created during the combustion process. The quicker these gases are evacuated, the better. Unfortunately, the factory down pipe in the N55 is quite restrictive, which results in slower exhaust gases and slower turbo spool. The Active Autowerke F-Chassis N55 Signature down pipe utilizes 3.5 diameter stainless steel piping in order to provide more power, quicker spool, and extreme durability. This variant includes a 4.5" Active Aflow catalytic converter that will NOT produce a CEL for cat efficie