PAC Racing Springs Valve Spring Shim Set PAC-S189-16, 0.030 in Thick, 1.250 in OD, 0.570 in ID, Steel, 16-Piece

The PAC Racing Springs PAC-S189-16 valve spring shim set is designed to provide precise spring seat adjustment and reliable support in high-performance engine applications. Each steel shim is manufactured with a 0.030-inch thickness, a 1.250-inch outside diameter, and a 0.570-inch inside diameter to help establish the correct installed height and maintain proper valve spring geometry. This set includes 16 shims for convenient installation across a complete engine application.
PAC Racing Springs valve spring shims help compensate for variations in cylinder head, valve, retainer, and spring dimensions during engine assembly. Properly selected shims can support consistent valve train setup, improve spring seat contact, and help ensure that the valve springs operate within their intended installed-height range. The durable steel construction is suited for demanding performance and racing environments where accurate component fitment and dependable service are essential.
The PAC-S189-16 set is a practical choice for professional engine builders, performance enthusiasts, and technicians tuning or rebuilding a compatible valve train. Verify the required shim thickness, outside diameter, inside diameter, spring pocket, and installed height before installation to ensure compatibility with the specific cylinder head and valve spring combination. This product is not air restricted and does not require truck freight shipping.

Features:

• Brand: PAC Racing Springs

• Part Number: PAC-S189-16

• Product Type: Valve spring shim set

• Material: Steel

• Shim Thickness: 0.030 in

• Outside Diameter: 1.250 in

• Inside Diameter: 0.570 in

• Quantity: 16 shims

• Application: Valve spring installed-height adjustment and seat support

• Shipping Classification: Not air restricted and not truck freight only