Manley Valve Spring Shim, SHIMS-1.437 X .030

Manley Performance is well-known for making strong internal engine components. This valve spring shim is a good example of their focus on precision parts for engine builds. It measures 1.437 inches in diameter and is .030 inch undersize, which is important for getting the correct installed height on your valve springs.

When you're rebuilding an engine, getting the exact installed height for your valve springs is critical for proper valve train geometry and performance. These shims are used to fine-tune that height. The .030 inch undersize specification means it's designed to be used when you need to make a small adjustment to achieve the perfect spring seat pressure. This is a common requirement in performance engine builds where every detail matters for reliability and power.