R1 Performance Package | W203 | C 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 mercedes-benz-cls-class--219---2006-2011--cls-500-esr9637543 Dyno measured by RENNtech (peak):

Dyno measured by RENNtech (peak): 681 HP @ 6

RENNtech is the foremost authority on transmission upgrades and has done countless rebuild and upgrades for the most demanding dealers and clients for over 35 years

"Vossen" and “Forged” machined in adjacent spoke windows

Weight optimization and developed specifically for the Mercedes-Benz 117 - CLA45 AMG

W222 - S-Class Sedan S450 (Air Body Control Optional)

R1 Performance Package | W203 | C 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 mercedes-benz-cls-class--219---2006-2011--cls-500-esr9637543 Dyno measured by RENNtech (peak):R1 Performance Package for 203 C 55 AMG. Includes ECU Upgrade and Carbon Fiber Air Box. Up to 385HP and 400LB FT. The R1 performance package for the Mercedes 55 series engine includes our proprietary ECU upgrade in addition to our full carbon fiber airbox upgrade which offers a larger volume of incoming air for better engine breathing and improved cylinder filling. This combination that provides noticeable increases horsepower, torque and throttle