RENNtech ECU Upgrade | R231 | SL 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 aston-martin-dbx-straight-six-esr4024283 Dyno measured by RENNtech (peak):

Dyno measured by RENNtech (peak):               489 HP @ 4

The Mercedes-AMG G 63 (W 463) is powered by the latest V8 BiTurbo -engine developed by AMG

Our intermediate level ECU upgrade for the Mercedes M157 Biturbo 4-MATIC engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability

G 55 AMG Modified Performance:

• AMG GT 63

RENNtech ECU Upgrade | R231 | SL 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 aston-martin-dbx-straight-six-esr4024283 Dyno measured by RENNtech (peak):ECU Upgrade 500HP 625LB FT Gains: +52HP +87LB FT Our intermediate level ECU upgrade for the Mercedes M278 engine still offers huge gains in performance across the entire RPM range, but with a slightly reduced peak HP and torque from our standard tune. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components or for areas and countries with extreme altitudes, temperatures or