RENNtech ECU+ Upgrade | W222 | S 63 AMG | Sedan | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2017 mercedes-benz-cls-class--218---2015-2018--cls63-amg-biturbo-4matic-esr2890927 806 LB-FT @ 4

806 LB-FT @ 4

Rated by RENNtech (peak @crank):              740 HP @ 5

E63 AMG S 4MATIC+ (MY2018+ | S213 | M177 | 4

Maserati Ghibli S Q4 (M157) 2013 - 2017

RENNtech strives to deliver the highest quality carbon fiber products in the industry

RENNtech ECU+ Upgrade | W222 | S 63 AMG | Sedan | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2017 mercedes-benz-cls-class--218---2015-2018--cls63-amg-biturbo-4matic-esr2890927 806 LB-FT @ 4ECU+ Upgrade Up to 669HP 734LB FT Gains: +65HP & +55LB FT RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be