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Valve Spring Cups, Locators & Shims

Valve Springs O.D. Locator Cups

Standard shims cannot handle the extreme pressure that high performance racing engines place on the springs. The solution to this problem is seats made from a high-strength steel alloy that hold the spring in place. The cup version of the seat sits outside of the spring and requires the head to be machined.

Valve Springs I.D. Locators

Standard shims cannot handle the extreme pressure that high performance racing engines place on the springs. The solution to this problem is seats made from a high-strength steel alloy that hold the spring in place. The I.D. locators fit on the inside of the spring and require no machining.

Valve Spring Shims

Shims are used to level the installed height of valve springs. Lunati offers the highest quality shims that are also heat-treated for durability and strength.