RENNtech ECU Upgrade | SL 65 AMG | R231 | 735HP/836LB-FT | 6.0L BiTurbo V12 | M279 mercedes-benz-glc-class-coupe--253---2016-present--glc-63-amg-esr1091906 similar to the pocketing process

similar to the pocketing process

C118 - CLA Coupe CLA250

2011-up Porsche Cayenne (958)

0L Inline-6 engine

RENNtech ECU Upgrade | SL 65 AMG | R231 | 735HP/836LB-FT | 6.0L BiTurbo V12 | M279 mercedes-benz-glc-class-coupe--253---2016-present--glc-63-amg-esr1091906 similar to the pocketing processRENNtech ECU Upgrade for 231 SL 65 AMG. Up to 735HP and 836LB FT. Gains: +114HP & +100LB 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