RENNtech HHT ECU Upgrade for GL 320 CDI (X164- 253 HP / 464 LB-FT) bentley-continental-gt-supersports--2017-2018--6-0l-w12-ea398-twin-turbo-esr9658979 222 - S 63 AMG

222 - S 63 AMG BiTurbo

With the proprietary RENNtech ECU Tuning the C190 AMG GT C gains up to +84 HP and +93 LB-FT

544 LB-FT Mercedes M157 engine performance when measured

Up to 534HP and 485LB-FT LB-FT

X253 - GLC63 AMG Coupe

RENNtech HHT ECU Upgrade for GL 320 CDI (X164- 253 HP / 464 LB-FT) bentley-continental-gt-supersports--2017-2018--6-0l-w12-ea398-twin-turbo-esr9658979 222 - S 63 AMGRENNtech HHT ECU Performance Upgrade for 166 GL 320 CDI. up to 253HP and 464LB FT. Gains: +23HP & 75LB 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