R1 Performance Package | C209 | CLK 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 mercedes-benz-ml-class--164---2006-2011--ml-350-bluetec-esr5895823 a twin sound valved muffler

a twin sound valved muffler set

BOV Adapters

The vast amount of increased torque across the entire RPM range gives the 550 an extra edge to compete with AMG powered vehicles

C257 - CLS 450

0" | Rear: 20" x 11

R1 Performance Package | C209 | CLK 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 mercedes-benz-ml-class--164---2006-2011--ml-350-bluetec-esr5895823 a twin sound valved mufflerR1 Performance Package for 209 CLK 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