BMW F87 M2C, F80 M3, F82 F83 M4 S55 J Pipe - ARM Motorsports 3 Series (E91) While coils do not increase

While coils do not increase horsepower unless the coil they are replacing are not doing their job the factory coils are lacking in proper output so much that all cars tested (stock or heavily modified) gain 20+ whp and 20+ wtq

The heart of the ARM MK7 GTI FMIC is it's efficient bar and plate intercooler core measuring 22 x 9 x 3

Solid Responsiveness: Forum users often praise Doc Vu for multiple live revisions and responsive feedback throughout the tuning process

consistent power delivery

*Actual flow rate may vary

BMW F87 M2C, F80 M3, F82 F83 M4 S55 J Pipe - ARM Motorsports 3 Series (E91) While coils do not increaseComplete your S55 upgraded charge piping with the ARM S55 J Pipe! This J Pipe is the final piece of piping on the S55 before the charge air enters the intake manifold. BMW constructed the OEM J Pipe of plastic which is prone to cracking an detaching from the throttle body under boost. The ARM S55 J Pipe is constructed of T6061 aluminum for a durable replacement that will hold up to even the most demanding builds. HIGHLIGHTS FULL T6061 ALUMINUM