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GSC oversized exhaust valve guide, .003in oversize, specified for Toyota and BMW B58/S58 engines. Supplied as a single guide, this precision-machined part serves machinists and engine builders needing corrected valve-to-guide fitment during cylinder head service. Use case is engine reconditioning where standard guides require oversizing to restore proper valve clearance and seating.
GSC Toyota/BMW B58/S58 .003in Oversize Exhaust Valve Guide - Single
