Supertech Valve Spring Shim .515in OD .796in ID .030in Thick (Drop Ship Only)

This is a Supertech valve spring shim, measuring .515 inches in outer diameter, .796 inches in inner diameter, and .030 inches thick. Shims like these are used to fine-tune valve spring installed height, which is critical for achieving the correct spring pressure and ensuring proper valve train operation. Getting the installed height just right helps prevent valve float at higher RPMs and ensures the springs aren't over-compressed, which could lead to premature failure.

Supertech is known for making well-built engine components, and these shims are no exception. They are made to precise measurements to ensure they fit correctly and perform as expected. Using a shim of the correct thickness allows you to make small adjustments to your valve spring setup without needing to change the entire spring or retainer assembly. This can be a cost-effective way to dial in your engine's performance, especially if you're rebuilding or modifying your cylinder head.