Hardened Valve Spring Shims Specifications- GM crate legal, thickest allowed Thickness: .015", .030" or .060" Heat treated Hardened Steel, Flat Black Finish For High Performance racing applications Fits 602 & 603 GM crate engines Sixteen per set.
1.250" O.D.
.875" I.D.
Use these CTS Non-Serrated Valve Spring Shims to support valve springs better. They won't compress to maintain pressure and protect heads from spring abrasion.
Three thicknesses are available:
.060" - for springs in service
.030" - for new springs
.015" - for balancing
