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PROFILE

The ARM 135i Race Exhaust is designed to increase power and deliver intoxicating sounds from your 135i by optimizing exhaust flow and reducing back pressure.  The ARM 135i Race Exhaust is direct bolt on system, and designed for a direct fit with the ARM N55 Downpipe, N54 Downpipes, or OEM downpipes.  

IMPROVED EXHAUST SOUND

The ARM 135i Race Exhaust delivers a low growl in the lower rpm range to aggressive  sound under full throttle as the RPMs increase towards redline. The ARM 135i Race Exhaust removes the secondary catalysts found in the N54 135i midpipe, the small muffler found in both the N54 and N55 midpipe, and the muffler of the axle back portion of the exhaust system. 

CONSTRUCTION

The ARM N55 135i Race Exhaust is built with high-grade TIG welded SS304 stainless steel.  It begins with a precision CNC machined flange at the midpipe which is a direct fit with the ARM N55 Downpipe, N54 Downpipes, or OEM downpipes.

This first section of the midpipe is a divided design comprised of two 2.5" sections.  The second section continues the divided design, until the axle back connection where it merges into a single 3" connection and continues as a single 3" pipe all the way until the exit where you have the choice of the Sport Silver or Stealth Black tips. 

IN THE BOX

FITMENT GUIDE