RENNtech ECU Hand Held Tuner (HHT) for G 55 (W463- 370 HP / 410 LB-FT) mercedes-benz-slk-class--171---2004-2010--slk-55-amg-esr5743216 Gains up to: +95 HP

Gains up to: +95 HP | +55 LB-FT

650rpm Note: Mercedes M176 engine performance when measured

+114 HP & +100 TQ

85 mph W222 - AMG S63 R3 Package w/Launch Control 2

Ghibli (M157)

RENNtech ECU Hand Held Tuner (HHT) for G 55 (W463- 370 HP / 410 LB-FT) mercedes-benz-slk-class--171---2004-2010--slk-55-amg-esr5743216 Gains up to: +95 HPRENNtech ECU HHT (HandHeldTuner) for the 463 G 55 AMG. Up to 380HP and 410 LB FT LB 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 few