The Peterbilt 579 2013 And Newer Cab/Sleeper/Extender Kit is a practical and versatile solution for Peterbilt 579 models with underbody exhaust. Made from durable stainless steel, this kit includes cab skirts and 80-inch sleeper skirts with an extender, providing a sleek and stylish look. The skirts measure 3 inches wide and feature a driver side block heater cutout for added convenience. Sold as a kit with all necessary hardware included, this product fits most Peterbilt 579 2013 and newer makes and models, making it a reliable and convenient choice for truck owners.