Spectre’s Differential Covers are made to OEM specifications and are triple chrome plated for a lasting shine. Designed to protect the intricate moving parts of the differential, Spectre’s covers add an extra layer of protection to the vehicle’s underside. Featuring a 10-bolt design and fits 1961-1989 Chrysler cars with a 8-1/4 inch ring gear. Includes 10 SAE standard chrome bolts for installation. You’ll need to supply your own bolts if your application requires metric bolts.