Allstar Performance shim kit for GM 8.5in 10 Bolt 1970-98 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 most GM cars and light trucks 1971 to 1984. Ring and pinion shim kit fits GM 10-bolt differentials (carrier and cover) with a 8.50 inch ring gear and a 30 spline pinion.