Auto Tuning Teil Mercedes E55, CLS55, SL55, G55, AMG 1132020419 M113K BLk Double Idler 55 AMG Kompressor By reducing the weight from 1.600g to 970g, compared to the original compressor / supercharger pulley, the moment of inertia / rotating mass could be reduced by 41%. Can be driven without Belt Wrap Kit. The entire compressor pulley is manufactured and assembled in Germany Manufacturer Part Number: Does Not Apply, Finish: silver anodized, Brand: UltimatePD Interchange Part Number: A1130900044, Type: Supercharger pulley