100mm Idler Pulley for use with Smaller SC Pulleys

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.