Coil-over sleeve kit for 51 Series 7" shocks. For use with 2.5" inner diameter spring. If you're looking for a coil-over kit for your circle track application, you are sure to find what you need with QA1. Coil-over kits contain some or all of the following, depending on the application: aluminum sleeve, spring cap, spring seat adjuster nut, wire ties, spring cap retainer pin, jam nut, and snap rings. Kits include components for one shock. Part #CK1951C also works for Streeters Shocks.