8mm LS Steel & Viton Dual/Single Spring Valve Stem Seals (Suits: 0.4825" Guides) while promoting more consistent torque

while promoting more consistent torque loading

We have developed a superior line of heads for modern performance enthusiasts

They also offer the potential for improved fuel economy by making the engine more efficient

Speedmaster carburetor adapters are designed to allow you to mount most any carburetor on most any manifold

8mm LS Steel & Viton Dual/Single Spring Valve Stem Seals (Suits: 0.4825" Guides) while promoting more consistent torqueValve stem seals control the lubrication of the valve stem as it slides in the valve guide. Too little oil causes stem and guide wear. Too much oil increases oil consumption and can cause a buildup of carbon, leading to valve seat damage and early valve grind. Speedmaster valve seals are posi stop seals made from high temperature Viton material for a long lasting seal.