GSC P-D Nissan VK56 Manganese Bronze Intake Valve Guide - Set 24 - 3048-16

GSC P-D Honda K-Series VTEC K20/24 Manganese Bronze Exhaust Valve Guide Stopper Style - SET OF 8 - 3023-8

GSC P-D Nissan VQ35 Manganese Bronze Exhaust Valve Guide +.001in Oversize OD - Single - 3043.001-1

GSC P-D Nissan VR38DETT 6.6mm Stem Manganese Bronze Exhaust Valve Guide Stopper Style - Single - 3143

GSC P-D Toyota 3SGTE Manganese Bronze Intake Valve Guide - Single - 3034