S58 MIDPIPE - G80 M3 G82/G83 M4HIGHLIGHTS Exotic Exhaust Sound X Pipe Design Fits OEM Underbody Brace SS304 Stainless Steel Saves 15lbs Over OEM PROFILE The ARM S58 Midpipe upgrade is designed to unleash the incredible exhaust sounds from your G80 M3 M4. By removing the secondary catalysts and two middle resonators, the ARM S58 Midpipe substantially improves the sound of your S58 powered BMW. Also, by retaining the OEM muffler, you still have the ability to control the exhaust
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