RENNtech Intermediate ECU Upgrade | C217 | S 63 AMG | Coupe | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2015-2017 mercedes-benz-e-class-wagon--213---2017-present--e-53-amg-esr5164676 W205 - C-Class Sedan C300

W205 - C-Class Sedan C300 | MY2019+

and refined which evolved into our final and optimal solution

RENNtech Exhaust Valve Module | Permanently Open Exhaust Flaps

up to an astonishing 669 HP and 734 lb/ft at the crank

463 - G 55 AMG Kompressor

RENNtech Intermediate ECU Upgrade | C217 | S 63 AMG | Coupe | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2015-2017 mercedes-benz-e-class-wagon--213---2017-present--e-53-amg-esr5164676 W205 - C-Class Sedan C300Intermediate ECU Upgrade Up to 638HP 695LB FT Gains: +33HP & +25LB FT RENNtech M157 Biturbo ECU Upgrades are TV approved! 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. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline