RENNtech Intermediate ECU Upgrade | W222 | S 63 AMG | Sedan | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2017 porsche-cayenne--92a---2011-2018--gts-esr8899844 521 LB-FT @ 3

521 LB-FT @ 3

S 550 (W221) Stock Performance:

RENNtech ECU HHT (HandHeldTuner) for the 463 - G 55 AMG

636 LB-FT @ 3

These proprietary carbon fiber side skirts were designed to complement the RENNtech front splitter and rear diffuser

RENNtech Intermediate ECU Upgrade | W222 | S 63 AMG | Sedan | 638 HP / 695 LB-FT | M157 | 5.5L V8 BiTurbo | MY2014-2017 porsche-cayenne--92a---2011-2018--gts-esr8899844 521 LB-FT @ 3Intermediate ECU Upgrade Up to 638HP 695LB FT Gains: +33HP & +25LB 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