*Includes trailing arm mount braces for added strength. *Some OE 12 bolt axle housing may require slight modification. Here you will find high performance Catapult Upper and Lower Trailing Arms, Panhard Rods, and Braces. This kit will complete your muscle car build! These high performance parts will improve handling, traction, and the overall control of your muscle car. This kit will help eliminate wheel hop in launches, will increase roll stiffness, and will greatly reduce your suspension deflection. The trailing arms are Heli-Arc welded to ensure they are built to last! These kits include the following: * 2 Upper Trailing Arms * 2 Lower Trailing Arms * 2 Trailing Arm Braces (Not all models) * PST Polygraphite Bushings * Installation Hardware