Find the best Peterbilt 579 parts in the business here at 4 State. The Peterbilt 579 semi truck is a solid and stately big rig designed for the needs of modern American truckers. Like other Peterbilt models, the 579 delivers on durability, reliability, safety, and comfort, so it rides like a dream for miles on end. What sets the Pete 579 model apart is the addition of features like cutting-edge integrated technology in-cab and an aerodynamic design optimized for fuel efficiency. Take your Peterbilt 579 to the next level and show off your personality with help from 4 State Trucks. From bumpers to exhaust to fenders and beyond, we have the best custom parts and aftermarket accessories for your Peterbilt big rig.