RENNtech ECU Upgrade | R231 | SL 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 porsche-911--991-1---2011-2016--turbo-esr5301476 Whether it’s a small deviation

Whether it’s a small deviation in the weave layup or a slight inconsistency in the finish

RENNtech Transmission Upgrade

Up to 514HP and 566LB-FT

RENNtech Carbon Fiber Front Strut Bar for the 204 - C Class - GLK Class

-High strength to weigh ratio

RENNtech ECU Upgrade | R231 | SL 550 | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 porsche-911--991-1---2011-2016--turbo-esr5301476 Whether it’s a small deviationECU 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