Hotchkis Sport Suspension helps to improve cornering and straight line acceleration of your 78-96 GM B-Body by reducing body roll with a rear Hotchkis Performance Sway Bar. Hotchkis bars feature lightweight hollow construction and include greasable polyurethane bushings, end links, brackets, Hotchkis bars are powder coated for durability, and tested and tuned to ensure the best performance possible. 1 3/8 inch Hollow Rear. Note: the rear bars is now hollow and utilizes a unique cnc machined mounting pad. Mounts like the factory bar and retains the same roll stiffness of the previous design. Hotchkis Does Not Recommend the purchase of the rear sway bar without the addition of the 2205F Front Bar.