Kit This H&R 11-17 BMW X3 F25 Sport Spring Kit is designed to improve the handling and performance of your BMW X3 F25. It lowers the ride height of the vehicle by approximately 1.3 in the front and 1.2 in the rear. The kit is made from high-tensile chrome-silicone steel and is corrosion-resistant for long-lasting performance. The progressive rate springs provide improved cornering and stability, while the powder-coated finish ensures the springs maintain their good looks even in the harshest conditions. This kit is easy to install and comes with all necessary hardware for a hassle-free installation.