RENNtech ECU+ Upgrade | X166 | GLS63 AMG | SUV | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo maserati-mc20-esr2615562 8 GT3 RS (HP: 450

8 GT3 RS (HP: 450 | Year: 09>)

black with red strakes

C43 AMG Sedan (W205 | M276 | 3

AMG GT S (MY2015-2017 | C190 | M178 | 4

RENNtech ECU+ Upgrade | X166 | GLS63 AMG | SUV | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo maserati-mc20-esr2615562 8 GT3 RS (HP: 450ECU+ Upgrade Up to 669HP 734LB FT Gains: +64HP & +108LB 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 vehicle can