MAD BMW S58 4" Fatboy Single Midpipe for G80 M3 & G82/G83 M4 G83 M4 improved throttle response

improved throttle response

This GT4 lip combines race-inspired looks with premium carbon craftsmanship

aggressive finish

Lightweight & Strong — Genuine carbon fiber offers stiffness without added mass

MAD BMW S58 4" Fatboy Single Midpipe for G80 M3 & G82/G83 M4 G83 M4 improved throttle responseLet the S58 sound like it should. The MAD 4" Fatboy Single Midpipe replaces the restrictive factory dual midsection on the G80 M3 and G82 G83 M4 with a high flow, single 4 inch pipe. By simplifying the exhaust path and increasing diameter, this midpipe sharpens throttle response, deepens tone, and helps the turbos move air more efficiently without adding harsh rasp. Key Features 4" Single Pipe Design Large diameter midsection reduces backpressure and