Dodge Timing Belt Pulley, Dyna-Sync Type C2, Taper-Lock Bore Type, 1/2 to 2-1/8 in Bore Dia, 6.862 in Outside Dia, 7.162 in, 60 Grooves, 3/8 in Pitch, 1 in Face Width, 4.38 in Hub Dia, 0.13 in Hub Projection, 2012 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