Ferrea VS1021-1 Viton Hi-Temp Valve Stem Seal ID - 5/16 8mm 500 Single

The Ferrea VS1021-1 is a premium high-temperature valve stem seal designed for demanding performance and racing applications. This single seal features Viton construction for superior heat resistance and durability in exhaust and intake valve applications.

Key Specifications:

• Valve guide size: 5/16 inch (8mm)
• Inner diameter: .500 inch
• Material: Viton hi-temp compound
• Application: Universal exhaust and intake valve seal
• Sold individually (single seal)

Performance Features:

• High-temperature Viton material provides excellent heat resistance for extreme engine conditions
• Precision-engineered to maintain proper oil control and prevent valve guide wear
• Compatible with .500 inch ID valve guides
• Race-proven design suitable for performance street and competition engines

Ferrea has been manufacturing premium racing valvetrain components for nearly 50 years, supplying professional racing series including Formula 1, Indy Car, NASCAR, and drag racing. Their valve seals feature advanced materials and tight tolerances to deliver maximum performance and reliability. This seal is commonly used with Ferrea valve guides and is ideal for engine builders seeking professional-grade components for high-performance builds.