PAC Racing Springs PAC-S191-16 Valve Spring Shims, 1.250 in OD, 0.015 in Thick, Set of 16

PAC Racing Springs PAC-S191-16 valve spring shims provide a precise way to adjust valve spring installed height and setup in performance engine applications. Manufactured from durable steel, these shims are designed for use beneath valve springs to help achieve the desired spring pressure and installed height during cylinder head assembly. The 0.015-inch thickness supports fine adjustment without requiring larger changes to the valvetrain configuration.
The shims feature a 1.250-inch outside diameter and a 0.570-inch inside diameter for compatibility with valve spring and locator arrangements using these specifications. Their accurately formed design promotes consistent seating between the spring and cylinder head or spring seat, helping maintain dependable valvetrain geometry. Each set includes 16 shims, making it suitable for servicing a complete multi-cylinder engine or keeping replacement pieces available during installation and tuning.
PAC Racing Springs is recognized for performance-oriented valvetrain components, and the PAC-S191-16 spring shim set is a practical choice for engine builders, racers, and technicians seeking controlled valve spring setup. Confirm the required spring seat diameter, retainer and locator compatibility, and installed height before installation. These steel shims are intended for professional engine assembly where precise component selection and accurate measurements are essential.

Features:

• Brand: PAC Racing Springs

• Part Number: PAC-S191-16

• Product Type: Valve spring shim set

• Material: Steel

• Thickness: 0.015 inch

• Outside Diameter: 1.250 inches

• Inside Diameter: 0.570 inch

• Quantity: Set of 16

• Application: Valve spring installed-height and spring-pressure adjustment