RENNtech ECU Upgrade | W166 | ML 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 land-rover-range-rover--l405-lg---2013-2021--5-0l-supercharged-v8--aj133--esr2936963 Up to 635HP and 780LB-FT

Up to 635HP and 780LB-FT

Gains: Up to +164HP | +88LB-FT

RPM for Mercedes-AMG S63 E-Performance

which will be credited upon return of OEM pipes and Vacuum Lines to RENNtech

CL 600 (C215 - M137 5

RENNtech ECU Upgrade | W166 | ML 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 land-rover-range-rover--l405-lg---2013-2021--5-0l-supercharged-v8--aj133--esr2936963 Up to 635HP and 780LB-FTECU Upgrade 480HP 605LB FT Gains: +32HP +67LB 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