4% GSC P-D GM 2.25in L x .341in ID x .5022in OD .35in Taper Intake/Exhaust Valve Guide -Single GSC Power Division Sale! from 1008 1049 /per Qty. Add to Cart This item is either made to order or has limited inventory. Please reach out to confirm lead times if needed. GSC P-D GM 2.25in L x .341in ID x .5022in OD .35in Taper Intake/Exhaust Valve Guide -Single