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This GSC oversized exhaust valve guide for Subaru FA20/BRZ applications is a +0.003in oversize stopper sold as a single unit. Targeted at engine rebuilds and precision valve work, the guide helps ensure correct valve position and sealing for FA20 engines when a slightly larger guide is required. It’s a specific service part for competent machine-shop or engine-repair tasks.
GSC Subaru FA20/BRZ +.003in Oversize Stopper Exhaust Valve Guide - Single
