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 RENNtech HHT (Hand Held Tuner)

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

The RENNtech Sturt Brace is custom made for the Mercedes-Benz 45 AMG Line-Up

0L BiTurbo V12 Engine) Modified Performance:

CLASS S (W 221) 550 [2 Filters Required] (HP: 435 | Year: 11 > )

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 RENNtech HHT (Hand Held Tuner)RENNtech 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.