GSC P-D Honda D16 1.872in L x .2360in ID x .4360in OD Intake/Exhaust Valve Guide - SET OF 8 GSC Power Division Sale! from 4965 5169 /per Qty. Sold Out This item is either made to order or has limited inventory. Please reach out to confirm lead times if needed. GSC P-D Honda D16 1.872in L x .2360in ID x .4360in OD Intake/Exhaust Valve Guide - SET OF 8