R2 | Performance Package | C205 - C63 /S AMG | 709 HP / 638 LB-FT | 4.0L V8 BiTurbo | M177R1 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
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