The Bilstein B6 1997 BMW 540i Base Front 36mm Monotube Strut Assembly is a high-performance suspension upgrade for the 1997 BMW 540i. It features a mono-tube design with 36mm diameter pistons, providing superior dampening and improved handling. The strut assembly is designed to replace the factory struts and provide superior performance in all conditions, including high-speed cornering and braking. The assembly includes all necessary hardware for installation and is backed by a limited lifetime warranty.