R2 | Performance Package | W205 - C63 /S AMG | 709 HP / 638 LB-FT | 4.0L V8 BiTurbo | M177 mercedes-benz-slk-class--171---2004-2010--slk-350-esr6719359 623 LB-FT @2

623 LB-FT @2

X167 - GLS 600

CLASS S (W 221) 500 Blue Efficiency [2 Filters Required] (HP: 435 | Year: 11 > )

Activation completely independent regardless of drive mode Override your cars factory exhaust flap setting with the push of a button

the rear diffuser offers an aggressive look and enhancing rear styling

R2 | Performance Package | W205 - C63 /S AMG | 709 HP / 638 LB-FT | 4.0L V8 BiTurbo | M177 mercedes-benz-slk-class--171---2004-2010--slk-350-esr6719359 623 LB-FT @2R1 Pkg includes: ECU Upgrade, Sport Muffler, BOV Adapter, High Flow Air Filter, Fuel System Upgrade, Stage I Turbocharger Upgrade. Gains: Up to +164 HP +88LB FT RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980s! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible