RENNtech | ECU Upgrade | W463 | G 63 AMG | 635 HP / 620 LB-FT | 5.5L BiTurbo V8 | M157 mercedes-benz-s-class--220---1999-2006--s-600-biturbo--2003-2006--esr5052819 550 RPM | 443 LB-FT

550 RPM  |  443 LB-FT @ 1

This Software update delivers up to 10 HP and 99 LB-FT more than the previous version

645 LB-FT @ 4

unique appearance to the rear exterior

RENNtech | ECU Upgrade | W463 | G 63 AMG | 635 HP / 620 LB-FT | 5.5L BiTurbo V8 | M157 mercedes-benz-s-class--220---1999-2006--s-600-biturbo--2003-2006--esr5052819 550 RPM | 443 LB-FTRENNtech ECU Upgrade for 463 G 63 AMG. Up to 635HP and 620TQ. Gains: +99HP & +60TQ 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