4% GSC P-D SBC Intake/Exhaust Valve Guide 2.25in L x .3415in ID x .502in OD +.003in .35in Taper- 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 SBC Intake/Exhaust Valve Guide 2.25in L x .3415in ID x .502in OD +.003in .35in Taper- Single