The Peterbilt Full Locking Main Differential Switch Guard Cover is a practical and durable accessory for your Peterbilt truck. Made of chrome plated stainless steel, it offers protection and style. With its full locking main differential engraving, it adds a touch of sophistication to your vehicle. This cover is designed to fit 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. Enhance the look and functionality of your truck with this reliable and easy-to-install guard cover.