RENNtech EVM | Exhaust Valve Module | 222 - S63 AMG Sedan and 217 - S63 AMG Coupe Pre-FaceLift MY2014-17 mercedes-benz-c-class--204-sedan---2008-2014--c-63--amg-black-series-esr3194090 Gains: +31HP & +31LB-FT

Gains: +31HP & +31LB-FT

The maximum power number reached with the RENNtech ECU Upgrade for the GLS 63 S AMG EQ Boost+ is 745 HP and 767 LB-FT

Note:  HP and TQ gains calculated by RENNtech are always based on peak stock results measured by RENNtech and upgraded peak results measured by RENNtech

The Rear Diffuser is designed to fit the AMG GT63 (S)

Reprogram control units in vehicle for different final drive ratio over factory/stock

RENNtech EVM | Exhaust Valve Module | 222 - S63 AMG Sedan and 217 - S63 AMG Coupe Pre-FaceLift MY2014-17 mercedes-benz-c-class--204-sedan---2008-2014--c-63--amg-black-series-esr3194090 Gains: +31HP & +31LB-FTRENNtech 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