BMW N54 JB4 Performance Tuner - 135i, 335i, 1M, 535i, X6, Z4 M235i (F23) An F30 N55 Downpipe is

An F30 N55 Downpipe is regarded as the best hardware upgrade to get the most power from your N55 powered F-Series BMW

lowering the effective octane

Regularly gap your competition

This pump can support up to 575whp (Rated for 500whp on 100% E85) and is ready to grow with you as your needs demand

and intriguing looks

BMW N54 JB4 Performance Tuner - 135i, 335i, 1M, 535i, X6, Z4 M235i (F23) An F30 N55 Downpipe isHow about up to 80hp to the wheels (100hp crank) on a completely stock car, up to 160hp to the wheels on factory turbos, or up to 350hp to the wheels on a fully modified car with larger turbo(s)? The JB4 includes a simple plug and play installation harness and is compatible with all ECU versions and transmission types. It's everything you need to take your N54 powered vehicle from mild to wild. In addition to several performance maps which can be