RENNtech ECU Upgrade | C218 | CLS 63 S AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014 mercedes-benz-e-class-sedan--212---2010-2013--e63-amg-biturbo--2012-2013--esr4033562 RPM for Mercedes-AMG 4

RPM for Mercedes-AMG 4

718 Boxster GTS 2

Our intermediate ECU tune increases performance from 550 HP and 544 lb/ft torque up to 638 HP and 695 lb/ft at the crank

offer a more responsive throttle and immediate power delivery thanks to a reduction in exhaust back pressure

RENNtech ECU Upgrade | C218 | CLS 63 S AMG | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014 mercedes-benz-e-class-sedan--212---2010-2013--e63-amg-biturbo--2012-2013--esr4033562 RPM for Mercedes-AMG 4ECU 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