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COMP Cams black Viton valve seals are 530-style seals with a .565" outer diameter, sized for 5/16" valve stems and .425" guides. Viton material provides excellent sealing properties and the clearance needed for spring movement, offering a reliable replacement seal for valve trains where dependable stem sealing and spring clearance are important.
COMP Cams Valve Seal 5/16in Viton
