RJ Pro Series Anti-Roll Bar Kit Works great on all cars up to 2200 horsepower and up to 4000 pounds. Our Pro Series Anti-Roll Bar is the most popular kit on the market today. We have used this proven design in many Pro Stock, Pro Mod and Top Sportsman cars. The 1-1/2” .188” wall 4130 shaft will reduce most body roll and will increase your performance. This kit is available in 36” width that you may cut to fit the exact width of your car. The 4130 weld on arms will not slip or become loose like bolt on arms. Kit includes material to box in the arms for increased strength. Our billet shaft mounts feature installed bronze bushings with grease zerks for smooth and controlled body roll. Comes complete with all mounting tabs, 4130 rod ends, links, hardware, and mounting instructions. (welding required)