UPD Mercedes AMG M113K 77MM Supercharger Pulley


The patented and original Ultimate Performance supercharger pulley upgrade for the AMG 55 Kompressor motor.
Our tests show 45- 50 rear wheel hp and torque gains, while maintaining a safe level of boost and supercharger rpm.
Pulley upgrade offers excellent drive-ability and does not adversely affect highway mileage.


Stock Power 469HP / 512TQ (Factory crank numbers, actually numbers at the wheels may vary.)
Gains 50HP / 60TQ


UPD Mercedes AMG 55k 113K 77mm Supercharger Pulley


77mm Clutched Supercharger Pulley and Shime


1 Hour


  • Dyno Tested
  • 4 PSI of boost gain
  • Mid to rev limit gains.
  • 35% lighter than factory pulley, reducing rotational mass
  • Special coating reduces belt slip
  • Improved nitride coated clutch, plate and spring design

1 year warranty.

Additional information

Weight 6 lbs
Dimensions 12 × 12 × 12 in


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