RENNtech ECU Upgrade | GL 550 | X166 | 480HP / 605LB-FT | 4.7L BiTurbo | M278 Engine audi-s3--8p---2006-2012--2-0l-tfsi-esr5566206 Upgraded Throttle Body and Stainless

Upgraded Throttle Body and Stainless Steel Headers

The customized crossbar is made out of high-performance carbon fiber to minimize flexing between the vehicles strut towers

Carbon Fiber Bumperette Delete for 2019+ CLS AMG 53

Power gains are calculated with stock numbers measured by RENNtech

R3 Performance Package for Mercedes-AMG G 63: ECU Upgrade (HHT)

RENNtech ECU Upgrade | GL 550 | X166 | 480HP / 605LB-FT | 4.7L BiTurbo | M278 Engine audi-s3--8p---2006-2012--2-0l-tfsi-esr5566206 Upgraded Throttle Body and StainlessECU 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