RENNtech ECU Hand Held Tuner | HHT | W463 | G55 AMG Kompressor | 536HP/552LB-FT | 5.5L Kompressor | M113 audi-rs4--b7---2006-2008--4-2-v8-fsi-esr4648829 773 HP +92 HP 778

773 HP +92 HP 778 LB-FT +42 LB-FT X290 - AMG GT63 R1 Package 783 HP +102 HP 788 LB-FT +52 LB-FT X290 - AMG GT63 R2 Package 793 HP +112 HP 788 LB-FT +52 LB-FT X290 - AMG GT63 R3 Package 875 HP +194 HP 871 LB-FT +135 LB-FT X290 - AMG GT63 R3+ Package 1

Up to 965 HP and 817 LB-FT @ crank with 93 Octane Fuel

176 - A 45 AMG and 156 - GLA 45 AMG

RENNtech HHT (Hand Held Tuner) allows you the unlimited ability to switch between tuned and stock ECU programming without ECU removal

RENNtech ECU Hand Held Tuner | HHT | W463 | G55 AMG Kompressor | 536HP/552LB-FT | 5.5L Kompressor | M113 audi-rs4--b7---2006-2008--4-2-v8-fsi-esr4648829 773 HP +92 HP 778RENNtech ECU HHT (HandHeldTuner) for the W463 G55 AMG Kompressor. Up to 536HP and 552LB FT . Gains: +36HP & +36LB 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.