RENNtech ECU+ Upgrade | X166 | GLS63 AMG | SUV | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo maserati-mc20-esr2615562 11 mph W213 - E63

11 mph W213 - E63 AMG S Sedan Stock w/Launch Control

C43 AMG Sedan (W205 | M276 | 3

Please note that the Mercedes M177 engine performance when measured

Finishing of the carbon fiber parts comes in the form of a high gloss UV protectant coating

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

RENNtech ECU+ Upgrade | X166 | GLS63 AMG | SUV | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo maserati-mc20-esr2615562 11 mph W213 - E63ECU+ 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