Dodge Timing Belt Pulley, Dyna-Sync Type CF1, Taper-Lock Bore Type, 1/2 to 2-11/16 in Bore Dia, 8.02 in Outside Dia, 7.639 in, 48 Grooves, 1/2 in Pitch, 1.32 in Face Width, 8.02 in Flange Dia, 4.44 in Hub Dia, 0.44 in Hub Projection, 2517 Bushing Synchronized and no-slip transmissionNo lubrication requiredApproximately 98% efficiency can obtainedLow maintenanceVirtually no backlashConstant linear velocity8.5:1 drive ratioEasy On/Off operationFlange design standard on drive size