RENNtech ECU Upgrade | G 65 AMG | W463 | 6.0L BiTurbo V12 | 670HP/740LB-FT | M279 mercedes-benz-gle-class--166---2016-2020--gle-63-amg-esr4679580 S 600 (W220) Stock Performance:

RENNtech ECU Upgrade | G 65 AMG | W463 | 6.0L BiTurbo V12 | 670HP/740LB-FT | M279 mercedes-benz-gle-class--166---2016-2020--gle-63-amg-esr4679580 S 600 (W220) Stock Performance:RENNtech ECU Upgrade for 463 G 65 AMG. Up to 670HP and 740LB FT. Gains: +35HP & +104LB 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

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