Save by adding custom tune and pulley combo in one bundle package! Pulley and tune cable shipped directly to you with instructions to custom tune via email file. Well proven fixed pulley tune combo over the last 10 years for the M113k AMG vehicles. This combo is equal to a 180mm crank pulley but much easier to install and less stress on the crank key way. Over 70hp/ 85 Torque gains!  

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 70plus 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.  Eliminates factory clutch that can fail and slip. Eliminates bearings, clutch and springs that are known to fail on OEM clutched pulley.     

Specs:

Increases horsepower and torque

35% lighter than factory pulley, reducing rotational mass

Reduced rotational mass increases supercharger longevity

Easy to install

Special coating reduces belt slip

Improved nitride coated design.