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Set of 16 Metal Body Viton Valve Seals for .500" 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 521 seals have a .545" OD and fit applications with 3/8" valves and .500" OD guides.

Set of 8 Metal Body Viton Valve Seals for .500" 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 521 seals have a .545" OD and fit applications with 3/8" valves and .500" OD guides.

1 Metal Body Viton Valve Seal 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 seal has a .575" OD and fits applications with 3/8" valves and .530" OD guides.

Set of 12 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 8 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.

1 Metal Viton Valve Seal 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. This 529 seal has a .675" OD and fits applications with 11/32" valves and .530" OD guides.

1 Black Viton Valve Seal for .425" Guide Size, 5/16" Valve Stem; Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. This 530 seal has a .565" OD and fits applications with 5/16" valves and .425" OD guides.

Set of 16 Black Viton Valve Seals for .425" Guide Size, 5/16" Valve Stem; Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. These 530 seals have a .565" OD and fits applications with 5/16" valves and .425" OD guides.

Set of 8 Black Viton Valve Seals for .425" Guide Size, 5/16" Valve Stem; Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. These 530 seals have a .565" OD and fits applications with 5/16" valves and .425" OD guides.

Set of 12 Metal Body Viton Valve Seals for .530" 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 520 seals have a .575" OD and fit applications with 5/16" valves and .530" OD guides.

Positive Stop PTFE Valve Seals for Dodge 5.7/6.2/6.4L HEMI

Viton Valve Seal for 2006-2016 GM 6600/6.6L Duramax Diesel; Constructed from Viton, this seal ensures a tight fit on 2006-2016 Duramax Diesels' 7mm valves. Designed specifically for use on the 0.450" guide diameter of the '06-'15 Duramax.