ARM G8x M3/M4 S58 4.5" Single Midpipe BIMECU Out of the downpipes

Out of the downpipes

Laser Ride Height Sensor

Refresh the look of your F8x M3/M3 with a V3 Carbon Fiber Front Lip

OBD II Emissions Compliant

ARM G8x M3/M4 S58 4.5" Single Midpipe BIMECU Out of the downpipesHIGHLIGHTS Exotic Exhaust Sound Massive 4. 5" Design SS304 Stainless Steel Saves 15lbs Over OEM PROFILE The ARM S58 4. 5" Single Midpipe upgrade is designed to unleash the incredible exhaust sounds from your G8X M3 M4. By removing the secondary catalysts and two middle resonators, the ARM S58 Midpipe substantially improve the sound of your S58 powered BMW. Also, by retaining the OEM muffler, you still have the ability to control the exhaust valves,