RENNtech ECU+ Upgrade | C218 | CLS 63 AMG | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014 mercedes-benz-gt-4-door-coupe--290---2019-present--gt-63-amg-esr2967697 The RENNtech Sport Muffler System

The RENNtech Sport Muffler System for the C217 - S 65 AMG Coupe comes with an integrated valve system and utilizes the electronic OEM actuators

0L V8 BiTurbo | M177 | MY2015+

The RENNtech Stage II Turbo Upgrade comes with an RENNtech ECU Upgrade and the RENNtech Fuel System Upgrade

0L V8 BiTurbo

RENNtech ECU+ Upgrade | C218 | CLS 63 AMG | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014 mercedes-benz-gt-4-door-coupe--290---2019-present--gt-63-amg-esr2967697 The RENNtech Sport Muffler SystemECU+ Upgrade Up to 669HP 734LB FT Gains: +65HP & +88LB 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