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The GSC intake valve guide for Nissan SR20 and RB26 engines is a manganese bronze replacement supplied as a single unit with a +.001in oversize outer diameter. It serves as a direct-fit valve guide to preserve valve stem alignment and consistent operation in rebuilt or serviced cylinder heads. The oversize dimension aids correct seating in cylinders where a slight re-bore is needed for a snug fit.
GSC P-D Nissan SR20/RB26 Manganese Bronze Intake Valve Guide +.001in Oversize OD - Single
