GSC P-D Porsche 996/997 Turbo Manganese Bronze STD Style Intake Valve Guide - SET OF 12 - 3058-12

GSC P-D Nissan VR38DETT Manganese Bronze Exhaust Valve Guide +.001in Oversize OD - Single - 3045.001-1

GSC P-D Toyota 2JZ STD Manganese Bronze Exhaust Valve Guide Stopper Style - Set of 12 - 3145-12

GSC P-D Honda D16 Manganese Bronze Intake/Exhaust Valve Guide +.001in Oversize OD - Single - 3060.001-1

GSC P-D SBC Manganese Bronze Int/Exh Valve Guide 2.525in L x .3415in ID x .502in OD +.003in - Single - 3074.003-1