RENNtech EVM | Exhaust Valve Module | Audi | S8 (D3/4E) porsche-911--991-2---2015-2019--speedster-esr6796864 Carrera 4S Cabriolet

Carrera 4S Cabriolet

212 - E 63 AMG BiTurbo

RENNtech ECU Upgrade for 166 - GL 450 BiTurbo 4-MATIC

utilizing existing factory mounting locations

RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980s

RENNtech EVM | Exhaust Valve Module | Audi | S8 (D3/4E) porsche-911--991-2---2015-2019--speedster-esr6796864 Carrera 4S CabrioletEVM 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)