Maximise the performance and sound of your BMW M3 or M4 G8X (Non-OPF/GPF models) with the Milltek Sport Secondary Catalyst Bypass. This bypass pipe removes the secondary catalyst from the exhaust system, eliminating a major flow restriction and allowing exhaust gases to exit the engine far more efficiently.
Used in conjunction with Milltek Sport's large bore downpipes, this secondary cat bypass enables significant power gains by removing all restriction on exhaust gas flow from the S58 engine. The result is sharper throttle response, improved mid-range performance, and a notably more aggressive exhaust tone.
Designed specifically for non-OPF/GPF models (North American and ROW specification), this bypass pipe is for use with a Milltek Axle-Back System. A race product intended for track use and should be paired with an appropriate ECU remap.
Manufactured from 304L aircraft-grade stainless steel and made in the UK.
