RENNtech ECU+ Upgrade | W166 | ML 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 mercedes-benz-cls-class--218---2011-2014--cls550-biturbo-esr9718723 produced using the same technology

produced using the same technology and materials as the F1 air filters

197 - SLS AMG

Modified Performance

the vehicle has to be present at the RENNtech HQ in Stuart

RENNtech is proud to have all aspects of the RPS development and production executed in conjucntion with Vossen Wheels in Miami

RENNtech ECU+ Upgrade | W166 | ML 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 mercedes-benz-cls-class--218---2011-2014--cls550-biturbo-esr9718723 produced using the same technologyECU+ Upgrade 540HP 705LB FT Gains: +92HP +167LB 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 minutes and the vehicle can be