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right down to the internal trumpets
This effectively eliminates porosity and aligns the grain structure of the metal
With the MAD Single Midpipe installed
Simply send in your key fob and we will take care of the rest
ARM G8x M3/M4 S58 4.5" Single Midpipe f93 m8 right down to the internalHIGHLIGHTS 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,
