1-3/4"x.134" wall mild steel roll bars are precision bent for each particular body style and feature notched tube ends (where applicable) for ease of installation. These roll bars are designed to increase chassis stiffness and protect the driver in the event of a crash. The kit includes a main hoop, rear braces, side bars, frame supports, seat crossmember and 6 steel mounting plates. This is a weld in kit. If you are running the stock inner door panels you will need to select the side bar option designed to clear the large door handles. You also have the option of choosing a swing out side bar kit. This hinges the side bar to allow easy entrance and exit from the vehicle. They are priced per side, and they meet NHRA specifications. All roll bars meet and exceed NHRA, IHRA & NMCA requirements.