R1 Performance Package | C209 | CLK 55 AMG | 385 HP / 400 LB-FT | 5.5L NA V8 | M113

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 response across the vehicles entire powerband while still maintaining daily driver reliability.  

R1 Performance Package includes:

• RENNtech ECU Upgrade
• RENNtech Full Carbon Fiber Airbox

CLK 55 (W209) Stock Performance:

• 362 HP @ 5750 RPM; 378 LB-FT @ 4000 RPM

Modified Performance:

• 385 HP @ 5500 RPM; 400 LB-FT @ 3000 RPM