Comp Cams Spring Shim Kit 1.300in O.D. x .520in ID for LS Engines

This kit from COMP Cams gives you the shims you need to properly install valve springs on your LS engine. You get eight individual shims, each measuring 1.300 inches in outside diameter and .520 inches in inside diameter. These shims are essential for setting the correct installed height for your valve springs, which is critical for consistent valve train geometry and performance.

Getting the installed height just right ensures your valve springs are operating within their intended range. Too short and you risk coil bind, too tall and you won't get the full benefit of the spring's pressure. This kit provides the specific dimensions needed for many LS engine applications, helping you achieve a solid foundation for your valvetrain setup. They are well-made pieces designed to do their job without issue.