Boker’s Inc. valve shim stacks offer unsurpassed finishing capabilities to accommodate a wide range of recreational, automotive and industrial applications. Boker’s precise, smooth finishing design ensures the shim stacks work together effectively and efficiently to dampen suspension movement. With over 95 years of experience-tested and made-to-order manufacturing capabilities, Boker’s Inc. valve shim stacks are precisely manufactured to unique customer specifications with fast delivery turnarounds.

Boker’s valve shim stacks feature exact, consistent thicknesses, inside diameters and outside diameters. Shims can be custom manufactured with outside diameters from 0.080” to 12” and material thicknesses from .005″ to .190″ to satisfy virtually any shim stack application, ranging from simple to complex.

To ensure reliable performance, shim stacks are heat treated to operate in temperatures exceeding 500 degrees without losing strength.