What is the purpose of a valve spring shim?

A valve spring shim is used to adjust the installed height of a valve spring. By placing a shim under the spring, you can slightly lower its seated position, which can help increase spring pressure or ensure proper seating in the cylinder head.

What does '.030 Undersize' mean for this shim?

'.030 Undersize' means the shim is 0.030 inches thinner than a standard or full-size shim. Using an undersize shim will result in a lower installed height for the valve spring compared to using a standard shim or no shim at all.

Are these shims compatible with all valve springs?

These shims are specifically designed by Manley Performance and are intended for use with their valve springs or other springs with a compatible diameter. It's always best to check the specifications to ensure they will work with your specific valvetrain components.

Specifications

Brand: Manley Performance
Part #: 03233-50
UPC: 807298043050

Manley Valve Spring Shim, SHIMS-1.480 X .030

Name: Manley Valve Spring Shim, SHIMS-1.480 X .030
Brand: Manley Performance
SKU: manley-performance-manley-valve-spring-shim-shims-1-480-x-030-t14-880136
Price: 39.42 USD
Availability: BackOrder

$39.42

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley Performance valve spring shim. This .030 inch undersize shim helps fine-tune valve spring installed height.

Key Features

Fits Manley valve springs and other compatible applications.
Measures 1.480 inches in diameter.
Features a 0.030 inch undersize thickness.
Helps achieve precise valve spring installed height.
Made by Manley Performance.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

When you're rebuilding an engine or upgrading your valvetrain, getting the exact installed height for your valve springs is crucial for proper performance and longevity. These valve spring shims from Manley Performance are designed to help you achieve that precise measurement. They are made to fit under the valve spring, allowing you to make small adjustments to the spring's seated height. This is especially important when using aftermarket cylinder heads or camshafts that might alter the original valve spring seat depth.

This particular shim measures 1.480 inches in diameter and is 0.030 inches thick, meaning it's an undersize shim. Using an undersize shim effectively lowers the installed height of the valve spring. This can be useful for increasing valve spring pressure slightly or ensuring the spring is correctly seated in applications where the valve spring pocket depth is slightly shallower than expected. Manley Performance is known for making well-built engine components, and these shims are no exception, offering a reliable way to dial in your valvetrain setup.