2004-05 GTO Rear Heavy Duty Sway Bar-this heavy-duty rear sway bar is an easy, cost-effective way to improve the traction and handling characteristics of any 2004-05 GTO. Constructed from 19.05mm (stock is 16mm) cold-drawn steel, it can yield noticeable reductions in both wheel hop and rear body roll during spirited driving. Two end-link mounting points on each side make it possible to preload the rear suspension for improved launches in drag-race applications. Includes low-deflection K-prene bushings. NOTES: Not compatible with SLP #73005 Rear Sway-Bar Bushings. Shipping is not included.