RENNtech ECU Hand Held Tuner (HHT) for SLK 55 | R171 | 380 HP / 395 TQ | MY2005-2009 sale-person RENNtech's GT-S adjustable lowering kit

RENNtech's GT-S adjustable lowering kit offers not only overall improved aesthetics and an aggressive vehicle stance

The Carbon Fiber Rear Wing for the Mercedes-Benz AMG GT Coupe dramatically improves rear end stability with an aggressive yet highly functional design

Exhaust Valve Module: The EVM allows you to fully open the exhaust valves of the AMG Sport Exhaust

Stainless Steel Downpipes with 200 cell catalytic converters

RENNtech ECU Hand Held Tuner (HHT) for SLK 55 | R171 | 380 HP / 395 TQ | MY2005-2009 sale-person RENNtech's GT-S adjustable lowering kitRENNtech ECU HHT (HandHeldTuner) for the R171 SLK 55 AMG. Up to 380HP and 395 LB FT TQ. Gains: +18HP & +17TQ. 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.