Hotchkis Sport Suspension 2278 2004-2006 Pontiac GTO Sport Sway Bars. Improve the cornering of your 04-06 GTO by reducing body roll with a set of Hotchkis Performance Sway Bars. Hotchkis bars feature lightweight hollow construction and include greasable polyurethane bushings and are powder coated for durability. Each bar set has been tested and tuned to ensure the best performance possible. Specs: 1-5/16 in. (33.5 mm) Hollow Front 3/4 in. (19mm) Solid Rear. Stiffness: Front 3 position adjustable: 37% 49% and 63% stiffer than stock. Rear 4 position adjustable 50% 76% 111% and 156% stiffer than stock. Testing Data 600 ft. Slalom Stock Best MPH 62.45 Hotchkis Sway Bars Best MPH 66.02 Driver Notes: The car exhibited much less body roll than stock and was much easier to drive at higher speeds. Improvement was over 3 MPH. The car exhibited much better steering response over stock form. Skid Pad Stock .799g Hotchkis Sway Bars .850g Testing Notes: Suspension completely stock except for upgraded Hotchkis Sway Bars. Applications: 2004 2005 2006 Pontiac GTO