The Speedmaster PCE271.1023 is a precision-manufactured hardened steel valve spring shim measuring 1.220" outer diameter, 0.511" inner diameter, and 0.030" thick. Designed to fine-tune installed valve spring height, this shim helps achieve accurate spring seat pressure and consistent valve train geometry for reliable engine performance.
Constructed from hardened steel for exceptional durability under the high-cycle stress of valve train operation, this shim is an essential tool for engine builders looking to dial in precise spring specifications during assembly or rebuild. Sold individually — verify your application's required shim dimensions before ordering.