We created trailing arms to match our boxed a arms in every way. First we increased strength tremendously over stock while adding just 11 pounds per arm. Our designs allow us to have the most ground clearance any other trailing arms on the market where it counts. We gain just over 4" of ground clearance throughout the arm but where it matters most is right under the shock mount which is at the front of the tire. We gain over 2" of usable clearance where it matters. We have material thickness at nearly a quarter of an inch on the bottom side of the arm so whether your cruising through the desert or bashing them in the rocks these arms are built to take it without failing. These are bolt on and work with the factory shocks without modification.