GSC P-D BMW M3 E46 S54 Manganese Bronze Intake/Exhaust Valve Guide - Set of 8 - 3096-12

GSC P-D Nissan TB48DE Manganese Bronze Intake Valve Guide - Set of 12 - 3030-12

GSC P-D BMW 335i E92 L6 Manganese Bronze Exhaust Valve Guide +.003in OD - Single - 3089.003-1

GSC P-D BMW E36 M3 Manganese Bronze Exhaust Valve Guide Stopper Style +.003in Oversize OD - Single - 3055.003-1

GSC P-D BMW M3 E36 Manganese Bronze Intake Valve Guide - Single - 3056