Competition Series 4" Catless Downpipe for the 5/6 Series N55 (6 Cylinder) Engine Finish:Brush Finish We bring the same thing

We bring the same thing to the N20 charge pipe

We also did extensive testing on the proper size to use to effectively cool the hot charged air as well as fight off heatsoak (when the intercooler cannot transfer heat away faster that the heating building up from the hot intake air)

We spent a lot of resources developing and manufacturing this factory style connection for this reason

5" outlet compared to the 4" outlet on the older N55 engines

2013-15 435i (F32/F33 Chassis)

Competition Series 4" Catless Downpipe for the 5/6 Series N55 (6 Cylinder) Engine Finish:Brush Finish We bring the same thingOur Competition Series 4" Downpipes for your 2011 16 535i (F10) and 2011 16 640i (F13). Key Features: Made in the USA! Manufactured in house. Available for the 2011+ BMW 535i (F10) with the N55 Engine. Available for the 2011+ BMW 640i (F12 F13) with the N55 Engine. Better throttle response and faster turbo spool up times. Mandrel Bent 4" piping. Smooth transition to the exhaust system. 100% Stainless Steel Construction Stainless Steel Flex Section