One of the major features of the Tilton 77-Series Rear Pivoting Master Cylinders is the ability to fine-tune the location of the cut-off port. This allows you to adjust pedal free play exactly where you want it to suit your driving style. These shims will fit 5/8", 0.70", and 3/4" bore sizes. Shims are sold in packs of 5.
Note: Tilton 77-Series master cylinders are hand-built and individually blueprinted for cut-off port travel. There is no "standard" shim size, as each master cylinder ships from the factory with whatever shims are required for uniform cut-off port location.