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 CLASS S (W 221) 500

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

The Downpipes in the pictures are shown prior to ceramic coating in order to present the craftsmanship of these hand made products

623 LB-FT @2

Note: Mercedes M157 engine performance when measured

648 HP   713 LB-FT   X167 - AMG GLS 63 ECU Upgrade 745 HP +97 HP 767 LB-FT +54 LB-FT X167 - AMG GLE 63 R1 Package 745 HP +97 HP 767 LB-FT +54 LB-FT X167 - AMG GLE 63 R3 Package 875 HP +194 HP 871 LB-FT +135 LB-FT

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 CLASS S (W 221) 500R1 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