RENNtech Intermediate ECU Upgrade | W166 | ML63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2013-15 maserati-ghibili--157---2013-2023--esr9661198 991 | Speedster

991 | Speedster

Gains: +53HP & +67TQ

up to an astonishing 582 HP and 752 lb/ft at the crank

050 RPM Mercedes M155 engine performance when measured

RENNtech proudly introduces this addition to an already impressive and highly successful aerodynamic upgrade program for the Mercedes-Benz SLS AMG

RENNtech Intermediate ECU Upgrade | W166 | ML63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2013-15 maserati-ghibili--157---2013-2023--esr9661198 991 | SpeedsterIntermediate ECU Upgrade Up to 638HP 695LB FT Gains: +64HP & +72LB FT RENNtech M157 Biturbo ECU+ Upgrades are TV approved! Our proprietary 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. Our intermediate level ECU upgrade offers huge gains in performance across the entire RPM range without sacrificing around town