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 the HSM will be 'married'

the HSM will be 'married' to the vehicle and can only be used with this vehicle

The RENNtech ECU Upgrade brings the C 43 AMG Coupe up to 400 HP and 440 LB-FT | Gains: +25 HP and +42 LB-FT

RENNtech Stainless Steel Sport Mufflers | C207 - E550 BiTurbo MY2012 - 2014

RENNtech ECU Upgrade for Bentley Continental GT Speed

362 hp @ 5

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 the HSM will be 'married'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