I have a slk32 with a code 3 supercharger pulley kit on it. Apparently this kit came with a modified idler pulley on it. This installation removes the grooved pulley and replaces it with a smooth pulley. It requires the belt to go under this pulley instead of over the top.

This idler pulley has shed half the bearings in it anyone know where i can get the aftermarket idler pulley the bearing is not coming out of the pulley.

The car runs in Denver at 5000ft above sea level so do I really need that special idler pulley to match the smaller code 3 supercharger pulley? I put the stock idler pulley on for now seems ok but i'm afraid the belt might slip.