Supertech Performance VSI-D5.5E-8 Valve Stem Seal Kit Ford Duratec 5.5mm Viton

These integral-style valve seals feature premium Viton material construction for superior heat resistance and durability in demanding performance environments.

Key Specifications:

• Stem Diameter: 5.5mm
• Guide Outer Diameter: 11mm (0.433 inches)
• Seal Outer Diameter: 14.7mm
• Material: Viton high-temperature compound
• Position: Suitable for both intake and exhaust applications
• Quantity: 8 seals per set

Features and Benefits:

• Reduced outer diameter design perfect for dual valve spring setups
• Viton material provides exceptional resistance to high temperatures and oil degradation
• Integral spring seat design for reliable valve spring retention
• Precision-manufactured to exacting tolerances for proper sealing
• Direct OEM replacement with performance upgrade characteristics

Supertech valve stem seals represent a critical component for building or rebuilding a high-performance valvetrain. The reduced outer diameter makes these seals ideal for applications where valve spring clearance is limited, while the premium Viton compound ensures long-lasting performance under extreme operating conditions.