This weld-in kit is made of 1-5/8 x .083" wall 4130 tubing It includes a main hoop, cage sides, windshield brace, X brace behind the main hoop, rear struts, side-bars, forward struts thru the firewall, two rocker tubes, four 6x6x1/8 inch mounting plates, eight 2-1/4 x 2-1/4 roll cage gussets, 1-1/4 OD back brace bar, dash bar, cage top triangulation, door X-braces, and subframe struts Designed to fit hardtop or sedan cars, and trucks listed. Fits most cars with the stock interior installed. They are not designed to fit convertible cars. In most cases the top will not function and the rear bars will need to be placed where the top folds in. Customer is responsible for any necessary modifications if purchased for a convertible car. This roll cage meets current NHRA requirements for cars with a 1/4 mile et of 8.50 or more. Helmet bar shown is optionally available. Includes drawing and instructions. OPTIONAL COMPONENTS IN BLUE