RENNtech ECU Upgrade | W212 | E 63 S AMG | Sedan | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2016 bentley-continental-gt-speed--2011-2018--6-0l-w12-ea398-twin-turbo-esr2694718 CLS 53 AMG (C257 -chassis)

CLS 53 AMG (C257 -chassis)

The part comes in standard primer or black paint

8L V12 Engine) Modified Performance:

the side skirts functionality is fully optimized when combined with the RENNtech front canards

RENNtech ECU Upgrade | W212 | E 63 S AMG | Sedan | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2016 bentley-continental-gt-speed--2011-2018--6-0l-w12-ea398-twin-turbo-esr2694718 CLS 53 AMG (C257 -chassis)ECU Upgrade Up to 638HP 695LB FT Gains: +33HP & +49LB 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 components