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 ECU+ Upgrade | 523HP /

ECU+ Upgrade | 523HP / 582TQ | Gains: +102HP / +128TQ

This entire cartridge is then fine balanced as a complete assembly to safely allow for these increases

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

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

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 ECU+ Upgrade | 523HP /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