Fits 2003 - 2007 AMG Mercedes 55K Models M113k motor. E55, S55, CL55, CLS55, SL55, fits 2005-2011 G55, 

Ultimate Performance fixed supercharger pulley upgrade for the AMG 55 Kompressor motor.  Our tests show 60- 75 rear wheel hp and torque gains, while maintaining a safe level of boost and supercharger rpm.  Pulley upgrade offers excellent driveability and does not adversely affect highway mileage. Removes oem clutch and reduces weight. Tune needed.   

Specs:

Increases horsepower and torque

35% lighter than factory pulley, reducing rotational mass

Reduced rotational mass increases supercharger longevity

77 mm diameter

Easy to install

Special coating reduces belt slip

Improved nitride coated design.