JB4 E Chassis N55 BMW JB4 Tuner (A-Harness) gasket kit 1x front pipe with resonator

1x  front pipe with resonator box

The kit includes two sets of thermal insulating spacers (shown above in the kit contents) to suit either 48mm or 34mm height injectors

One Lap of America

and can actually cause leaks

Please specify color when ordering

JB4 E Chassis N55 BMW JB4 Tuner (A-Harness) gasket kit 1x front pipe with resonatorJB4 Tuner for N55 E Chassis BMW How about up to 60hp to the wheels (80hp crank) on a completely stock car or up to 100hp to the wheels (120hp crank) on a fully modified car? The JB4 features a simple plug & play installation harness for easy installation and includes many features not found on any other tune. Including on the fly in dash map switching between factory and various performance maps, optional in dash gauge displays for boost and other