RENNtech ECU Hand Held Tuner (HHT) for SLK 55 | R171 | 380 HP / 395 TQ | MY2005-2009 mercedes-benz-cla-class--118---2020-present--cla-35--amg-esr2775909 The Carbon Fiber Air Box

The Carbon Fiber Air Box kit includes a Set of 2 BMC high performance air filter

the factory settings do NOT allow the valves to fully open unless certain speed and/or RPM have been reached

*Generic Picture

Each system comes complete with the carbon central cover

RENNtech ECU Hand Held Tuner (HHT) for SLK 55 | R171 | 380 HP / 395 TQ | MY2005-2009 mercedes-benz-cla-class--118---2020-present--cla-35--amg-esr2775909 The Carbon Fiber Air BoxRENNtech 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.