BMW F9x S58 Single Mid Pipe with Extended Underbrace – X3M & X4M Pre-LCI | Gtech Motorsports
This Gtech Motorsports single mid pipe for BMW X3M and X4M models replaces the factory mid pipe with a 304 stainless steel system, improving exhaust tone and throttle response.
- The description claims improved throttle response and flow for measurable power gains.