Ferrea VS1020-1 Viton Valve Stem Seal ID - 5/16 8mm 530in

The Ferrea VS1020-1 is a high-performance Viton valve stem seal designed for both intake and exhaust applications. This single seal features a 5/16-inch (8mm) stem diameter with a .530-inch inner diameter, making it compatible with a wide range of big block and small block engine builds.

Key Features:

• Viton rubber compound construction for superior heat resistance and durability
• Hi-temp compound suitable for both intake and exhaust applications
• 5/16-inch (8mm) valve stem size with .530-inch inner diameter
• Precision-engineered to provide exceptional oil control while maintaining proper lubrication
• Designed to work with compatible valve guides (pairs with VG1088 valve guides)
• Resistant to extreme heat, oil additives, and abrasion
• Exceeds OEM specifications for racing and high-performance applications

Ferrea valve seals are manufactured using advanced rubber compound materials specifically formulated to withstand the demanding conditions of high-performance and racing engines. The Viton construction provides precise oil control and maximum durability even at high RPM, preventing oil from entering the combustion chamber while ensuring proper valve stem lubrication. Backed by nearly 50 years of racing component manufacturing expertise, Ferrea valve seals deliver race-proven reliability for serious engine builders.