This is our Super Duty Truss. This Truss is made for the most extreme use, most people will never ever see the need to run this truss. It is designed to give you the torsional rigidity required to run a link setup with well over 500 HP and 500 Ft Lbs of torque input, this is the big one. We all see lots of tube style trusses in use but a tube dosen't address the twist introduced with torque input, tubes will make the axle stronger and give a place to mount your upper links but do little beyond that. Then there are the plate steel variations that are also great axle strengtheners and even better mounting points for links but again, do little about torsional twisting. Our truss designs incorporate a full torsion box for strength in every way others do but the box design also resists' the twist incurred with extreme torque input. No bolts to break or keep retightening, weld and walk away! It has a .375" shell thicknes and a .375" baseplate thickness. This truss has a 6.5" clearance over the axle tubes and 20" clearance over the inside length. The Torsion box measures 1.75" X 3.75", a little bigger than a 2 x 4, about 400 times stronger!