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This COMP Cams Viton valve seal is specified for 5/16" valve stems and .425" guides, using a 530-style profile with a .565" outer diameter. Viton construction provides strong sealing properties and good spring clearance, making these seals suitable for performance-focused valve trains where dependable oil control at the stem and guide interface is required.
COMP Cams Valve Seal 5/16in Viton For .4
