RENNtech EVM | Exhaust Valve Module | 172 - SLC 43 AMG; 253 - GLC AMG Models SUV + Coupe mercedes-benz-s-class-coupe-140---1992-1999--sec-600-esr4155053 Note: This item requires cutting

Note: This item requires cutting off the factory airbox snout

Gains: up to 10HP & 15 TQ

900rpm Note: Mercedes M278 engine performance when measured

Rated by RENNtech (peak @crank):              818 HP @ 6

RENNtech EVM | Exhaust Valve Module | 172 - SLC 43 AMG; 253 - GLC AMG Models SUV + Coupe mercedes-benz-s-class-coupe-140---1992-1999--sec-600-esr4155053 Note: This item requires cuttingRENNtech Exhaust Valve Module Permanently Open Exhaust Flaps. 172 SLC 43 AMG; 253 GLC AMG Models SUV + Coupe EVM Exhaust Valve Module (Remote Controlled) NOT SO FUN FACT: If your Mercedes AMG is equipped with factory exhaust valves, with or without a center console button to open or close them, factory settings do NOT allow the flaps to fully open unless certain speed and or RPM have been reached. For example, while cruising the exhaust flaps will