Find the best aftermarket and custom Peterbilt parts for your 587 semi truck in the business here at 4 State Trucks. The 587 is an aerodynamic semi truck, offering a smooth ride and advanced features. With help from 4 State Trucks, you can install custom, chrome, and aftermarket parts to personalize the aesthetic of your truck and improve performance. Shop for aftermarket bumpers, exhaust kits, fuel tanks, seating, and so much more. We have everything you need to have the Peterbilt of your dreams.