BMW F87 M2C, F80 M3, F82 F83 M4 S55 J Pipe - ARM Motorsports 3 Series (E91) The JB4 attaches to the

The JB4 attaches to the manifold TMAP

Some even bypass the PCV system altogether venting crankcase gas and odor to the atmosphere

If you're looking for a more extreme sound

consistent power delivery

BMW F87 M2C, F80 M3, F82 F83 M4 S55 J Pipe - ARM Motorsports 3 Series (E91) The JB4 attaches to theComplete 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