RENNtech ECU Upgrade | G 65 AMG | W463 | 6.0L BiTurbo V12 | 670HP/740LB-FT | M279 audi-s4--b9---2017-2024--3-0l-turbocharged-v6-tfsi-esr1699755 The functionality of the Rear

The functionality of the Rear Diffuser is fully optimized when combined with the RENNtech front splitter

GLS 450 BiTurbo (X166 - M276 Biturbo 4-MATIC Engine) Stock Performance:

230 - SL 63 AMG

Rated by Mercedes-Benz:      577 HP @ 5

Stock: 424 HP | 428 LB FT

RENNtech ECU Upgrade | G 65 AMG | W463 | 6.0L BiTurbo V12 | 670HP/740LB-FT | M279 audi-s4--b9---2017-2024--3-0l-turbocharged-v6-tfsi-esr1699755 The functionality of the RearRENNtech 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