RENNtech ECU+ Upgrade | C218 | CLS 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2018 mercedes-benz-g-class--463---2019-present--g63-amg-esr5086164 ECU+ Upgrade | 540HP /

ECU+ Upgrade | 540HP / 705LB-FT | Gains: +105HP / +262LB-FT

The RENNtech CPC is highly recommended with RENNtech ECU tunes and included with our Turbo upgrade packages

RENNtech Stainless Steel Sport Mufflers for AMG SL 55 / SL 63 MY (R232) and AMG GT 55 & AMG GT 63 (C192)

Gains up to: +60 HP | +57 LB FT

and refined which evolved into our final and optimal solution

RENNtech ECU+ Upgrade | C218 | CLS 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2018 mercedes-benz-g-class--463---2019-present--g63-amg-esr5086164 ECU+ Upgrade | 540HP /ECU+ Upgrade 540HP 705LB FT Gains: +105HP +262LB 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