This swing-out door bar kit meets NHRA sactioning rules for OEM fulbody cars that have a 7.50 E.T. or slower. 247-3182 is for 6 and 8 point 1-3/4'' steel tubing cages and 247-3183 is for 10 and 12 point 1-5/8'' steel tubing. The kit includes hinges bracket, release pin and lanyard. Welding is required.