ARM G8x M3/M4 S58 4.5" Single Midpipe BIMECU For details on CustomROM visit

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• 2015-2019 F20/F21 B38 BMW 116i

Pleasingly louder

Make: BMW Model: E90 M3 [2008-2012] Submodel: 4

ARM G8x M3/M4 S58 4.5" Single Midpipe BIMECU For details on CustomROM visitHIGHLIGHTS 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,