RENNtech EVM | Exhaust Valve Module | Porsche | 911 | Cayenne | Cayman | Boxster | Panamera mclaren-slr-sls-class--197---2012-2014--esr2245349 which evolved into our final

which evolved into our final and optimal solution

650rpm Note: Mercedes M176 engine performance when measured

With the proprietary RENNtech ECU+ Tuning the C205 - C 63 AMG Coupe gains up to +56 HP and +107 LB-FT

Rated by Mercedes-Benz:      550 HP @ 5

5L V8 Supercharged) Stock Performance:

RENNtech EVM | Exhaust Valve Module | Porsche | 911 | Cayenne | Cayman | Boxster | Panamera mclaren-slr-sls-class--197---2012-2014--esr2245349 which evolved into our finalEVM Exhaust Valve Module (Remote Controlled) NOT SO FUN FACT: If your vehicle 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 never fully open! THE EVM SOLUTION: RENNtechs Exhaust Valve Module, (EVM) gives you complete control over the exhaust