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 |
|---|---|---|---|
| MercedesC-ClassMercedes > C-Class > C63 AMG > 2007 to 2011 | — | 2007–2011 | C63 AMG |
| MercedesC-ClassMercedes > C-Class > Coupé 63 AMG > 2007 to 2011 | — | 2007–2011 | Coupé 63 AMG |