RENNtech Intermediate ECU Upgrade | X166 | GLS63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2016+ maserati-mc20-esr2615562 521 LB-FT @ 3

521 LB-FT @ 3

Stainless Steel Mounting hardware

RENNtech's boost gauge features an internal microprocessor which controls the pointer (needle) movement and a digital high torque stepper motor to ensure quick

RENNtech Pre-Preg Carbon Fiber Rear Diffuser Extensions for the C190 - AMG GT R

Designed in-house by RENNtech the Bumperette Delete removes the North American spec “bumperettes” of the AMG GT -series

RENNtech Intermediate ECU Upgrade | X166 | GLS63 AMG | SUV | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2016+ maserati-mc20-esr2615562 521 LB-FT @ 3Intermediate ECU Upgrade Up to 638HP 695LB FT Gains: +33HP & +69LB 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