
This non-resonated secondary catalyst bypass for the BMW G80/G81 M3 and G82 M4 uses larger 101.6mm (4") tubing to suit large-bore downpipes, removing the secondary catalysts for significantly improved exhaust flow and a louder, more aggressive exhaust note.
Please note: This is a race product intended for off-road/motorsport use only, is not E-marked for road use, and may require an ECU remap to run correctly without fault codes. Fits to Milltek large-bore downpipes and the original equipment axle-back system only.
Features
- Removes the secondary catalysts
- Non-Resonated design
- 101.6mm (4") pipe diameter
- Approximately 1.5 to 2 hours to fit (including removal of the OE system)
- Race product – not E-marked
Fitment
- BMW M3 Saloon (G80)
- BMW M3 Touring (G81)
- BMW M4 Coupé (G82)