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100mm Idler Pulley for use with Smaller SC Pulleys

100mm Idler Pulley for use with Smaller SC Pulleys

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  • Easy installation
  • Constructed of black hardcoat anodized Billet aluminum
  • Heavy-duty bearing
  • Factory bolt is reused
  • Fits 2011-2016 Mustang 5.0 L with TVS blower
  • Fits 2003-2004 Cobra (see below)
  • DOES NOT fit 2007-2014 GT500


The VMP 100 mm idler pulley is designed to reduce belt slack and increase supercharger pulley belt wrap when utilizing a smaller supercharger pulley. 

Constructed of lightweight durable Billet aluminum that's anodized for wear, the VMP 100 mm idler pulley utilizes a factory size NSK heavy-duty bearing. By utilizing the proper sized bearing, the need for double bearings is eliminated. , the need for 


  • 2003-2004 Cobra: the use of two of these idlers allows for the use of the stock belt with a 2.6" to 3.0" upper. 
  • 2011-2016 Mustangs: a small amount of grinding is required. Recommended for pulleys 69 mm and smaller.