RENNtech ECU Upgrade | R231 | SL 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 aston-martin-dbx-straight-six-esr4024283 G 55 AMG Modified Performance:

G 55 AMG Modified Performance:

No drilling or modifications to the trunk are necessary

W222 - S-Class Sedan S450 (Air Body Control Optional)

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

RENNtech ECU Upgrade | R231 | SL 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 aston-martin-dbx-straight-six-esr4024283 G 55 AMG Modified Performance: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