Some mis-leading info in here. I can assure you caltrac style rods will stop tramp no matter what height the Ute. The problem is they are underneath the leaf so you lose quite a bit of ground clearance. I made mine for minimal cost and can leave the line full throttle, 15psi and zero tramp. Another option (I hear) works well and someone else has done it in this thread, with good results. Is replace the main leaf with a heavier 10 mm leaf. Also solid mounting the leafs to help remove twist. Spending 6k+ for a 4 link on a street car, to stop tramp is ridiculous. If it is the way you wanna go though, McDonald brothers do a 4 link for half the price.