The Bilstein B4 1992 BMW 318i Base Front Left Twintube Strut Assembly is a high-performance suspension strut designed to provide superior handling and stability for the 1992 BMW 318i. It features a twintube design with a gas-pressurized monotube inner and a steel outer tube for added strength and durability. The strut is made from a high-quality steel and is corrosion-resistant for long-lasting performance. It is designed to provide a smoother ride and reduce road noise while improving cornering and braking performance. The Bilstein B4 strut assembly is an ideal choice for those looking to upgrade their vehicle's suspension system.