Allstar Performance shim kit for GM 8.875in 12 Bolt Car in race car drivetrains. Adjusts gear backlash for precise setup in racing builds. Bolt-on installation for track use.
Backed by a 90-day limited factory warranty. Sold as one complete kit. This is a complete kit containing all the hard-to-find individual parts for a quick, trouble-free installation. Ring and pinion shim kit fits GM 12-bolt differentials with a 8. 875 inch ring gear found is most hi-performance passenger cars.