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.

COMP Cams 1 Black Viton Valve Seal for .425" Guide Size, 5/16" Valve Stem 530-1

Specifications:

Description_SHO	Valve Stem Oil Seal
Description_INV	Viton Seal .425" Guide Size, 5/16" Valve
Description_ASC	Available in a set of 8 under 530-8, available in a set of 16 under 530-16
Description_KEY	PTFE
Description_KEY	Seal
Description_KEY	Valve Guide
Description_KEY	Valve Guide Seal
Description_KEY	Valve Stem Seal
Description_KEY	Valve Seals
Description_KEY	5/16" Valve Seals
Description_KEY	11/32" Valve Seals
Description_KEY	.530" Valve Seal
Description_KEY	Umbrella
Description_KEY	O-Ring Seals
Description_KEY	Viton Seals
Description_KEY	8 mm Seals
Description_DES	1 Black Viton Valve Seal for .425" Guide Size, 5/16" Valve Stem
Description_SHP	None
Description_ASM	Engines w/ 0.425" OD Valve Guides and 5/16" Valve Stems
Description_EXT	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.
Description_DEF	Engine Valve Stem Oil Seal