DescriptionGSC Power-Division Traditional Exhaust Valve Guide for BMW E36 M3 6CylStandard sized sold as set of 12 or individuallyOversized sold individually as 0.001″ and 0.003″GSC3055Standard (in/mm)Total Length1.714 / 43.54Outer Diameter0.4937 / 12.54Valve Stem Diameter6mm