RENNtech ECU Upgrade | C217 | S 550 Coupé | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2017 bentley-flying-spur-speed--2022-2024--6-0l-w12-tsi-esr8340154 The end result is nothing

The end result is nothing short of spectacular with the RENNtech turbo package gaining up to 198 hp and 138 lb-ft

AMG GT S (MY2018+ | C190 | M178 | 4

Measured on RENNtech’s in-house DYNO the R3 -upgrade increases the power output to 938 WHP and 731 WTQ

R2 Performance Package for 215 - CL 55 AMG Kompressor

RENNtech ECU Upgrade | C217 | S 550 Coupé | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2017 bentley-flying-spur-speed--2022-2024--6-0l-w12-tsi-esr8340154 The end result is nothingECU Upgrade 500HP 625LB FT Gains: +26HP +59LB 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