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Set of 16 Metal Body Viton Valve Seals for .500" Guide Size, 5/16" Valve Stem; Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 516 seals have a .545" OD and fit applications with 5/16" valves and .500" OD guides.

Set of 16 Metal Body Viton Valve Seals for .530" Guide Size, 3/8" Valve Stem; Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 522 seals have a .575" OD and fit applications with 3/8" valves and .530" OD guides.

Set of 16 Metal Viton Valve Seals for .530" Guide Size, 11/32" Valve Stem; Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. These 529 seals have a .675" OD and fits applications with 11/32" valves and .530" OD guides.

Set of 16 Umbrella Valve Seals for Stock Guide Size, 11/32" Valve Stem; Typically requiring no machine work, our 502 umbrella seals are a great option for stock guide applications with 11/32" valves needing a seal replacement.

Set of 16 PTFE Valve Seals for .530" Guide Size, 11/32" Valve Stem; COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. These 503 seals have a .630" outer diameter and fit applications with 11/32" valves and .530" OD valve guides.

Set of 16 Umbrella Valve Seals for Stock Guide Size, 3/8" Valve Stem; Typically requiring no machine work, our 504 umbrella seals are a great option for stock guide applications with 3/8" valves needing a seal replacement.

Set of 16 Steel Viton Valve Seals for .500" Guide Size, 8mm Valve Stem; Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 511 seals have a .600" OD and fit LS applications with 8mm valves and .500" OD guides.