H&R 27mm Front / 21mm Rear Sway Bar Kit | BMW Z4 (03-08) (72276)H&R Sport Sway Bars for your 2003 2008 BMW Z4 (E85) are designed for drivers who desire improved handling without lowering or affecting ride quality. H&R Sport Sway Bars increase your suspension's roll stiffness or its resistance to roll in turns while maintaining ride comfort and dramatically increasing cornering control, lateral stability, and grip. A unique feature of H&R Sport Sway Bars are the smooth, machined like forged ends that, for specific