The old standard shims will not hold up to the extreme spring pressures and high rpm in today's race engines. offers a simple but effective solution to this problem. These valve spring locators provide a thin, hardened steel alloy seat that will not only protect the head and shim, but also locate and hold the spring in place. 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.
Specifications - 0.060 in. Thick
- 0.640 in. I.d.
- 1.570 in. O.d.
- SKU: ZX9KSAO23914