A great upgrade to the factory idler pulley, the VMP 90 mm idler pulley uses a factory size and brand NSK heavy-duty bearing. When the proper sized bearing is used, the need for double bearings is eliminated.

This is slightly shorter for use with 10% OD balancer only, and smaller blower pulleys (2.5" and less) with no idlers. Belt also works with stock balancer, stock idler and 2.5" pulley on 2007-2012 GT500. If you have an aux idler or a larger blower pulley...

07-14 Shelby GT500 Supercharger Pulley Use this Gates Heavy Duty belt on your Shelby GT500 with the stock or TVS supercharger when you install a 2.4" or 2.5" pulley and using the stock lower. The use of an idler pulley will not be required. NOTE: Gates...

Having belt slip issues on your supercharged GT500? VMP's adjustable belt tensioner provides better belt wrap around your blower pulley and eliminates excessive belt slip with smaller pulleys on higher boost applications.