Allstar Performance shim kit for GM 8.875in 12 Bolt Truck in race car drivetrains. Adjusts gear backlash for precise setup in racing builds. Bolt-on installation for track use.
Sold as one complete kit. This is a complete kit containing all the hard-to-find individual parts for a quick, trouble-free installation. Applications include 1964 to 1982 trucks and blazers. Ring and pinion shim kit fits GM 12-bolt differentials with a 8. 875 inch ring gear.