For cars using a 3x2" ladder bar or 4-link crossmember, this 1x2", box-tube driveshaft loop allows the use of a straight frame crossmember to increase ground clearance. This 360-degree-oval, full loop has a 5" inside width and 11" inside height for use by the rear U-joint with 7"-travel shocks. The inside height you need is determined by the required movement of the driveshaft in your chassis.