RENNtech M157 Biturbo ECU Upgrades are TÜV 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