RENNtech Stage II Turbo Upgrade Package | X290 | GT 63 (S) AMG | 1,017 HP / 871 LB-FT | 4.0L V8 BiTurbo | M177 | MY2019+ mercedes-benz-slk-class--171---2004-2010--slk-350-esr6719359 Rated by RENNtech: 601 HP

Rated by RENNtech:              601 HP @ 6

Rated by Mercedes-Benz:      469 HP @ 6

This Software update delivers up to 10 HP and 99 LB-FT more than the previous version

S 600 (W220 - M137 5

The RENNtech brand has featured several highly successful wheel designs throughout its 28+ years in the aftermarket industry

RENNtech Stage II Turbo Upgrade Package | X290 | GT 63 (S) AMG | 1,017 HP / 871 LB-FT | 4.0L V8 BiTurbo | M177 | MY2019+ mercedes-benz-slk-class--171---2004-2010--slk-350-esr6719359 Rated by RENNtech: 601 HPIncludes Upgraded Turbos, ECU Upgrade, upgraded CPC Unit and Fuel System Upgrade. Gains: Up to +336HP +137LB FT The Mercedes X290 GT 63 (S) AMG 4 Door Coupe comes with the newest engine fully developed by AMG, the companys Affalterbach based performance division and long fabled engine builder. The result is nothing short of spectacular and the 4. 0L V8 BiTurbo engine is an incredible platform to build performance upon. In addition to that, the all new