This section of the ARM S55 Midpipe includes a 4.5" resonator to tune the tone of the exhaust into a deeper, more desirable range, as the S55 is notorious for having a high-pitched, raspy exhaust note.  Paired with the ARM S55 Downpipes, the ARM S55 Midpipe will make your F8X one of the best sounding on the road.   

The next section of the ARM S55 Midpipe Upgrade transitions again to a Y-pipe, which allows you to reconnect your OEM muffler.  This Y-pipe connects to the single midpipe with a slip-fit connection and then utilizes the two 2.5" pipes included in the ARM S55 Midpipe Upgrade to extend to the OEM rear muffler section, or to the ARM S55 Track Exhaust.


Due to the larger size of the ARM S55 Midpipe, the OEM under-brace cannot be utilized. To address this, the ARM S55 Midpipe includes a specially designed under-brace that is specifically engineered to fit with the larger midpipe.  The under brace included in the ARM S55 Midpipe Kit is designed with  precision and manufactured from 6061 aluminum to ensure strength, durability, and a perfect fit, while keeping the weight to a minimum.  Installation of the under brace is a simple bolt-on process and mounts directly to the factory mounting points, ensuring a secure and stable fit.



 

IN THE BOX

FITMENT GUIDE

The ARM S55 Midpipe Upgrade will fit any downpipes that connect to the OEM midpipes.

Make	Model	Submodel	Engine
BMW	F80	M3	S55 3.0L
BMW	F82	M4	S55 3.0L
BMW	F83	M4	S55 3.0L