H&R 28mm F&R D&S Sway Bar Kit | BMW 320i/328i xDrive (13-18), 428i Cabrio AWD (14-16) (72878-6)H&R Sport Sway Bars for your 2014 2016 BMW 428i Cabrio AWD (F33) 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,