8mm LS Steel & Viton Dual/Single Spring Valve Stem Seals (Suits: 0.4825" Guides) We have developed a superior

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

while promoting more consistent torque loading

Holley Performance Products and similar intakesOur Fuel Rail Kits include what is shown in the image

measuring 102mm

Individually milled from super durable 6061 T6 aluminum billets

8mm LS Steel & Viton Dual/Single Spring Valve Stem Seals (Suits: 0.4825" Guides) We have developed a superiorValve 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.