RENNtech | ECU Upgrade | W463 | G 63 AMG | 635 HP / 620 TQ | 5.5L BiTurbo V8 | M157

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 be reflashed at any time as many times as you wish.

RENNtech M157 Biturbo ECU Upgrades are TÃœV approved!

Our proprietary ECU upgrade for the Mercedes M157 engine offers huge gains in performance across the entire RPM range without sacrificing around-town comfort or daily driver reliability.

G 63 (W463) M157 Bi Turbo-Stock Performance:

• 536 HP @ 5500 RPM; 560 LB-FT @ 4800 RPM

• Note: We have found the new M157 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz. We typically see slightly higher baseline numbers than claimed by the factory.

Modified Performance:

• 635 HP @ 5500 RPM; 620 LB-FT @ 3800 RPM