Valve Stem Seal - 5/16 in Valve Stem - 0.420 Guide OD - Viton - Set of 8

Valve Stem Oil Seal

Manley Performance Valve Stem Seals are engineered to provide a precise, leak-free seal that helps control oil consumption while maintaining proper valve lubrication. Manufactured from premium materials for exceptional durability and heat resistance, they are designed to withstand the demands of high-performance and racing engines.

Part Type

Engine Valve Stem Oil Seal

• A necessity when using NexTek® triple valve springs
• Special design allows clearance inside small I.D. springs
• Spring loaded wiper to remove excess oil

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Reference Information

Valve Stem Seals, Viton®, Positive Stop, .420 in. Guide, 5/16 in. Valve Stem, Set of 8

Manley Viton® valve stem seals are designed to keep oil out of the combustion chamber. They are manufactured from special Viton® material for maximum control and durability throughout the entire rpm range. The seals feature a special smaller design to allow for clearance in small inside-diameter valve springs.