This heavy-duty mounting kit comes with the parts necessary to attach both of your race truck or pre-runner trailing arms to your 3" or 4" axle tubes. The standoff distance from bolt to the tube can either be 2" or 3" depending on your needs. These DIY kits also come with either 9/16" or 3/4" bolt holes. Welding these up yourself saves you money that can be used for other components on your build! Bolts and misalignment bushings are not included. Comes with two brackets.