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 offer a more responsive throttle

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

C253 - GLC Coupe GLC63 AMG Coupe | MY2020+

718 Boxster GTS 2

Diffuser Attachments and Rear Lipp Attachment

Stock: 592 HP | 590 LB-FT

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 offer a more responsive throttleECU 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