Better bearings, springs and billet parts than OEM. NO tune needed and will give a little bump to HP, since it is 35% lighter and 2mm smaller that OEM.
83mm supercharger pulley AMG mercedes M113K E55,CLS55,S55, CL55,G55, A1130900044
Red Edition 77mm supercharger pulley AMG mercedes M113K E55,CLS55,S55, CL55, G55
77mm supercharger pulley / Belt wrap kit bundle AMG mercedes M113K E55, SL55,etc
77mm supercharger pulley AMG mercedes M113K E55,CLS55,S55, CL55,G55, Up 70 hp!!
83mm supercharger pulley / Belt wrap kit bundle AMG mercedes M113K E55, CLS55
