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 you need the K100852 belt.
This Part Fits:
        
       This Part Fits:
| Year | Make | Model | Submodel | 
|---|---|---|---|
| 2007-2014 | Ford | Mustang | Shelby GT500 |