COMP Cams Spring I.D. Locators [O.D. 1.400" | I.D. .520"] (GM LS)

The older style standard shims will not hold up to the extreme spring pressures and high RPM found in racing engines being built today. COMP Cams® offers a simple but effective solution to this problem − a thin, hardened steel alloy seat which will not only protect the head and shim but also locate and hold the spring in place.  Previously, this part has been available only in a cup form with the retaining portion being on the outside of the part. This required that the head be machined a great deal to accept this cup so COMP® now offers an I.D. locator with the locating shoulder on the inside, as well as the spring cup. Many sizes are available to locate from the inside or outside diameter.