COMP Cams 517-1 Metal Body Viton Valve Stem Oil Seal Guide Stem - 500 11/32

The COMP Cams 517-1 is a high-performance valve stem oil seal designed for precision engine rebuilds and performance applications. This seal features a durable metal body construction with a Viton (fluoroelastomer) sealing element that provides superior heat resistance and oil control compared to standard rubber seals.

Key Specifications:

• Metal body construction for enhanced durability and heat dissipation
• Viton sealing material resists high temperatures up to 400°F
• Designed for .500" (1/2") valve guide outer diameter
• Fits 11/32" (.344") valve stem diameter
• Positive valve stem seal design controls oil consumption
• Suitable for both intake and exhaust applications

Applications:

These valve seals are ideal for high-performance and racing engines where precise oil control is critical. The Viton material maintains its sealing properties under extreme cylinder head temperatures, making these seals well-suited for boosted applications, high-RPM engines, and street/strip builds. The metal body provides structural rigidity and consistent sealing pressure throughout the valve's travel.

Installation Note:

Proper installation requires a valve seal installation tool matched to the seal diameter. Seals should be installed with the valve spring removed and care taken not to damage the Viton lip during installation over the valve keeper groove.