Some vehicles sport two catalysts due to their dual pipe assembly. The Secondary Catalyst Bypass pipe removes the secondary catalysst to further improve gas-flow and reduce the restrictions caused by catalysts within the exhaust system.
| Vehicle | Chassis | Years | Engine |
|---|---|---|---|
| BMW3 SeriesBMW > 3 Series > F80 M3 & M3 Competition Saloon (Non OPF/GPF Models Only) > 2014 to 2018 | F80 | 2014–2018 | F80 M3 & M3 Competition Saloon (Non OPF/GPF Models Only) |
| BMW4 SeriesBMW > 4 Series > F82/83 M4 Coupe/Convertible & M4 Competition Coupé (Non-OPF equipped models only) > 2014 to 2018 | F82 | 2014–2018 | F82/83 M4 Coupe/Convertible & M4 Competition Coupé (Non-OPF equipped models only) |