RENNtech Intermediate ECU Upgrade | W222 | S 63 AMG | Sedan | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2017 mercedes-benz-gt-4-door-coupe--290---2019-present--gt-63-amg-esr2967697 Up to 528HP and 552LB-FT

Up to 528HP and 552LB-FT

X290 - AMG GT 4-Door Coupe AMG GT 43

CLASS E SW (S 211) 350 V6 4-matic [2 Filters Required] (HP: 272 | Year: 05 > 09)

This highly integrated pre-preg carbon fiber spoiler compliments the sophisticated and refined CLS-Coupe exterior design language

Crank Performance Numbers are calculated with a 18% Drivetrain loss on SUVs

RENNtech Intermediate ECU Upgrade | W222 | S 63 AMG | Sedan | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2017 mercedes-benz-gt-4-door-coupe--290---2019-present--gt-63-amg-esr2967697 Up to 528HP and 552LB-FTIntermediate ECU Upgrade Up to 638HP 695LB FT Gains: +33HP & +25LB FT RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the