RENNtech Stage I Turbo Upgrade | C190 | AMG GT S | 714HP/604LB-FT | 4.0L V8 BiTurbo | M178 | MY2018+Includes Turbo Upgrade, ECU Upgrade, and Blow Off Valves. Gains: Up to +178HP +109LB FT The Mercedes GT S is the second Mercedes Benz vehicle fully developed by AMG, the companys Affalterbach based performance division and long fabled engine builder. The resulting vehicle is nothing short of spectacular and the 4. 0L V8 BiTurbo engine within is an incredible platform to build performance upon. RENNtech lightweight forged billet turbo wheels feature a
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