R1 Performance Package | C209 | CLK 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 audi-s8--d4---2012-2018--4-0l-v8-esr7501940 E 63 (W212) Stock performance:

E 63 (W212) Stock performance:

362 hp @ 5

Akrapovic Downpipe (SS) for BMW M3 (F80) and M4 (F82

Hard facts:

R1 Performance Package | C209 | CLK 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113 audi-s8--d4---2012-2018--4-0l-v8-esr7501940 E 63 (W212) Stock performance:R1 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