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GSC manganese bronze standard‑style intake valve guide for Porsche 996 and 997 Turbo engines is available as a single replacement from GSC Power Division. Intended for intake side valve train maintenance, the STD style guide helps reestablish correct valve stem alignment and clearance in turbo Porsche heads. Sold individually for targeted repairs or phased rebuilds where OE-style fit matters.
GSC P-D Porsche 996/997 Turbo Manganese Bronze STD Style Intake Valve Guide - Single
