The Peterbilt Rear Full Locking Differential Switch Guard Cover is a durable and practical addition to your truck. Made of chrome-plated stainless steel, this cover features rear full locking differential engraving and is sold individually. It fits most Peterbilt 370 series trucks from 2001 through 2007, as well as most Peterbilt 365, 367, 384, 386, 388, and 389 series trucks from 2006 and newer. Protect your switch guard and add a touch of style to your truck with this reliable and easy-to-install cover.