58 MM diameter x 1.375" wide heavy duty idler for 6 and 8-rib belts This is a replacement idler for VMP 8-rib kits. This is an upgrade idler for standard street style no-grind FEAD on VMP Odin and VMP Gen3R kits. Hard black anodize 17 MM bearing bore 14 MM bearing width 47 MM bearing OD1.375" wide for 6 and 8-rib belts Bearing is nearly centered/pulley is almost symmetrical with only .020" offset Fits factory Shelby GT500 tensioners '20+ KR3Z-6B209-A Fits VMP upgraded Shelby GT500 tensioner VMP-SUT007 Fits VMP Odin/Gen3R upgrade tensioner for no-grind FEAD VMP-SUT009. May fit other tensioners from Thumprrr, Whipple, and Kenne Bell