FTP Introduces the UPD Belt Wrap Kit a Solution to increase Boost, and Stop Supercharger Belt Slip on all M113K engines found in 2003-07 55K AMG Cars! This CNC Machined Aluminum Belt wrap kit Increases the surface area where the belt contacts the S/C Pulley form 45% contact to over 75% Belt Contact and EXTENDS your S/C Belt Life. This Kit utilizes high speed ZZ rated bearings and Its a must have item for your STOCK or HEAVILY modified 55K AMG!