RENNtech EVM | Exhaust Valve Module | 172 - SLC 43 AMG; 253 - GLC AMG Models SUV + Coupe audi-a6--c5---1999-2005--4-2-l-v8-esr1955596 all without droning

all without droning

+ 12 LB-FT

X253 - GLC 43 AMG SUV | *Needs to be equipped with optional performance exhaust/factory valves*

Gains: Up to 10HP & 15TQ

RENNtech ECU Upgrade for 207 - E 550 Coupe BiTurbo

RENNtech EVM | Exhaust Valve Module | 172 - SLC 43 AMG; 253 - GLC AMG Models SUV + Coupe audi-a6--c5---1999-2005--4-2-l-v8-esr1955596 all without droningRENNtech Exhaust Valve Module Permanently Open Exhaust Flaps. 172 SLC 43 AMG; 253 GLC AMG Models SUV + Coupe 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 exhaust flaps will