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The Ford Racing positive-type guide-mounted valve stem seals fit most production valve guides with diameters from .550 to .570 in and are sized for stems near 11/32 in diameter. These seals include precise dimensional features for reliable seating and retention, supplying the sealing detail needed when servicing valvetrains that use standard production guide sizes.
Ford Racing Valve Stem Seals Positive-Type Guide-Mounted Seal
