The Speedmaster PCE271.1013 is a precision-ground hardened steel valve spring shim designed to fine-tune installed valve spring height and pressure. With an outer diameter of 1.220", an inner diameter of 0.511", and a thickness of 0.040", this shim allows engine builders to achieve accurate spring seat pressures during assembly without the need for machine work.
Constructed from hardened steel for long-lasting durability under the demanding conditions of the valvetrain, this shim is a reliable solution for engine rebuilds, performance builds, and any application requiring precise valve spring adjustment. Always verify compatibility with your specific cylinder head and valve spring dimensions before installation.