RENNtech Exhaust Valve Modules Aston Martin DBX | EVM audi-s8--d4---2012-2018--4-0l-v8-esr7501940 this forged design features much

this forged design features much tighter tolerances than spun multi-piece wheels

Weight optimization and developed specifically for the Mercedes-Benz S-Class

Rated by Mercedes-Benz:      503 HP @ 6

Rated by RENNtech (peak @crank):              745 HP @ 6

CLASS S LONG (W 221) 500 [ONLY USA] [2 Filters Required] (HP: 387 | Year: 05 >)

RENNtech Exhaust Valve Modules Aston Martin DBX | EVM audi-s8--d4---2012-2018--4-0l-v8-esr7501940 this forged design features muchRENNtechs plug & play EVM Exhaust Valve Module allows you to open the exhaust flaps of your car 100% at all times press Button 1 on the remote control. If you wish to go back to factory settings press Button 2. This gives you complete control over the exhaust sound and rumble of your car at any time regardless of speed, RPM or driving mode! RENNtech has been at the forefront of Mercedes Benz AMG upgrades since the mid 1980s. Decades of experience with