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GSC manganese bronze intake/exhaust valve guide for GM engines, specified at 2.1 in length with .341 in ID and .5022 in OD, is a single replacement unit from GSC Power Division. The dimensional listing supports accurate selection for head servicing where those exact sizes are required. Sold individually to allow precise, part‑specific replacement during valve train repairs and rebuilds.
GSC P-D GM 2.1in L x .341in ID x .5022in OD Manganese Bronze Intake/Exhaust Valve Guide - Single
