RENNtech EVM | Exhaust Valve Module | 222 - S63 AMG Sedan and 217 - S63 AMG Coupe Pre-FaceLift MY2014-17 mercedes-benz-gt-4-door-coupe--290---2019-present--gt-63-amg-esr2967697 This also keeps the dampener

This also keeps the dampener fluid temperature cool for consistant operation

R2 Performance Package for the C205 - C 63 AMG includes:

Fully compatible with factory exhaust of Mercedes-AMG SL 55

Includes ECU Upgrade and TCU Upgrade

Carbon Fiber Airboxes

RENNtech EVM | Exhaust Valve Module | 222 - S63 AMG Sedan and 217 - S63 AMG Coupe Pre-FaceLift MY2014-17 mercedes-benz-gt-4-door-coupe--290---2019-present--gt-63-amg-esr2967697 This also keeps the dampenerRENNtech Exhaust Valve Module Permanently Open Exhaust Flaps. 222 S63 AMG Sedan and 217 S63 AMG Coupe Pre FaceLift MY2014 17 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