COMP Cams Valve Seal 3-8 Viton Metal Bo

Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 521 seal has a .545" OD and fits applications with 3/8" valves and .500" OD guides.

PTFE; Seal; Valve Guide; Valve Guide Seal; Valve Stem Seal; Valve Seals; 5/16" Valve Seals; 11/32" Valve Seals; .530" Valve Seal; Umbrella; O-Ring Seals; Viton Seals; 8 mm Seals

Available in a set of 8 under 521-8, available in a set of 12 under 521-12, available in a set of 16 under 521-16

1 Metal Body Viton Valve Seal for .500" Guide Size, 3/8" Valve Stem

Engines w/ 0.500" OD Valve Guides and 3/8" Valve Stems

COMP Cams Valve Seal 3/8 Viton Metal Bo

1 Viton Seal .500" Guide 3/8" Valve

Engine Valve Stem Oil Seal

Valve Stem Oil Seal

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