The Peterbilt 579 Long Hood Cab And 72 Inch Sleeper And Extension Panel Kit is a practical and beneficial addition to your Peterbilt 579 model. Made of stainless steel, this kit is 2 - 1/2 inches wide and comes with 2 block heater holes. It is sold as a kit and can be easily installed using the supplied hardware. Designed to fit most Peterbilt 579 models with a long hood and 2 block heater holes without extension, this kit enhances the functionality and durability of your truck. Upgrade your Peterbilt 579 with this reliable and efficient extension panel kit.