H&R Sport Spring Kit w/ Sport Suspension | BMW Z4 sDrive30i/sDrive35i/sDrive35is (09-16) (28987-1)H&R Sport Springs for your 2009 2016 BMW Z4 sDrive35is w Sport Suspension (E89) are H&R's number one selling product. Enhance the look of your vehicle with a reduced fender well gap. H&R Sport Springs lower the vehicle's center of gravity and reduce body roll for better handling. The progressive spring rate design provides superb ride quality and comfort. A lower wind resistance signature will make the vehicle more streamlined and improve gas mileage.