BMW F8X M3 M4 S55 J PIPE

Complete your S55 charge-piping upgrade with the ARM S55 J Pipe — the final piece of piping before the charge air enters the intake manifold. BMW made the OEM J pipe from plastic, which is prone to cracking and detaching from the throttle body under boost. The ARM J pipe is machined from T6061 aluminum for a durable replacement that holds up to the most demanding builds.

Highlights

• Full T6061 aluminum construction.
• Secured throttle-body connection via a CNC-machined connector with a locking C-clip (replaces BMW's one-time-use plastic strip).
• 2x pre-plugged 1/8" NPT ports for post-intercooler methanol or nitrous injection.
• Direct fit, with a precisely machined vacuum-line port to prevent leaks.

Two methanol ports matter: J pipes with only one port can't supply enough methanol to advance timing for meaningful power gains.

Fitment (S55 3.0L)

BMW F80 M3, F82 M4, F83 M4, F87 M2 Competition.

What's included: ARM S55 J pipe, intercooler-to-J-pipe silicone hose, throttle-body retaining C-clip, clamps.

Backed by ARM Motorsports' lifetime warranty against defects in craftsmanship and fitment.

Ships from our Vancouver shop — KORE SPEED is proudly Canadian-owned, with no surprise cross-border duties for Canadian buyers. Questions on fitment? Email support@korespeed.com.