RENNtech EVM | Exhaust Valve Module | Aston Martin mercedes-benz-cl-class--215---2001-2006--cl-600-biturbo--2003-2006--esr3211224 Modified Peformance:

Modified Peformance:

The RENNtech ECU Plus Upgrade brings the SLR McLaren up to 675 HP and 646 LB-FT | Gains: +47 HP and +25 LB-FT

Not just a simple side skirt

By optimizing the path and increasing the volume of incoming airflow

S/SEL 500 (W140)

RENNtech EVM | Exhaust Valve Module | Aston Martin mercedes-benz-cl-class--215---2001-2006--cl-600-biturbo--2003-2006--esr3211224 Modified Peformance:EVM Exhaust Valve Module (Remote Controlled) NOT SO FUN FACT: If your vehicle 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 never fully open! THE EVM SOLUTION: RENNtechs Exhaust Valve Module, (EVM) gives you complete control over the exhaust