RENNtech EVM | Exhaust Valve Module | Audi | Bentley | Lamborghini | Porsche audi-s8--d3-4e---2006-2010--5-2l-v10-esr7428051 Available in gloss or matte

Available in gloss or matte finish

With the proprietary RENNtech ECU Tuning the C253 - GLC63 4MATIC+ gains up to +75 HP and +113LB-FT

Maserati Quattroporte S Q4 (M156) 2013-2017

517 HP @ 6800 RPM

S63 AMG Sedan | MY2018+

RENNtech EVM | Exhaust Valve Module | Audi | Bentley | Lamborghini | Porsche audi-s8--d3-4e---2006-2010--5-2l-v10-esr7428051 Available in gloss or matteEVM Exhaust Valve Module (Remote Controlled) NOT SO FUN FACT: Sportscars equipped with factory exhaust valves, with or without a center console button to open or close them, the factory settings do NOT allow the valves to fully open unless certain speed and or RPM have been reached. For example, while cruising the exhaust valves will never fully open! THE EVM SOLUTION: By pressing Button 1 on the remote control, RENNtechs Exhaust Valve Module (EVM)