RENNtech ECU Hand Held Tuner (HHT) for C 55 | W203 | 380 HP / 395 LB-FT | MY2005-2006 mercedes-benz-s-class--222---2018-2020--s-63-amg-biturbo-esr3217492 RENNtech Pre-Preg Carbon Fiber Rear

RENNtech Pre-Preg Carbon Fiber Rear Decklid Spoiler | C257 - CLS Coupe | Gloss Finish

Bentley  Continental GT Speed (MY2012-18)

As seen in the Dyno-Graph

The addition of the upgraded diverter valve helps the engine to handle boost spikes in high boost pressure applications better

The Exhaust Valve Module allows you to fully open the exhaust valves of the AMG Sport Exhaust by pressing Button 1 on the remote control

RENNtech ECU Hand Held Tuner (HHT) for C 55 | W203 | 380 HP / 395 LB-FT | MY2005-2006 mercedes-benz-s-class--222---2018-2020--s-63-amg-biturbo-esr3217492 RENNtech Pre-Preg Carbon Fiber RearRENNtech ECU HHT (HandHeldTuner) for the 203 C 55 AMG. Up to 380HP and 395 LB FT. Gains: +18HP & +17LB 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.