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5" outlet compared to the 4" outlet on the older N55 engines
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)
The cooling system on the N54 engine is already at its maximum capacity and we have seen overheating issues with both oil and coolant while racing
Another added benefit is that by keeping in heat (energy) in the exhaust gases inside the downpipe
We bring the same thing to the N20 charge pipe
Competition Series 4" Catless Downpipe for the 5/6 Series N55 (6 Cylinder) Engine Finish:Brush Finish 5" outlet compared to theOur 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
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