DescriptionGSC Power-Division Stoppe Style Exhaust Valve Guide for FA20 all (WRX/BRZ)Standard sized sold individuallyOversized sold individually as 0.001″ and 0.003″GSC3105Standard (in/mm)Total Length1.456 / 36.98Outer Diameter0.3964 / 10.07Valve Stem Diameter5.5mm