To make your big rig stand out from the rest, you'll want to have the best custom semi truck frame or semi truck chassis parts that you can get. At 4 State Trucks, we have everything you need to make your semi truck look and work exactly how you want it to. Whether you drive a Peterbilt, Kenworth, Freightliner, or any other make, we have high-quality aftermarket semi truck parts for your frame or chassis that will bring your 18 wheeler to the next level. Shop online to take advantage of our big selection.