The Bilstein B12 1999 BMW M3 Base Front and Rear Suspension Kit is a high-performance suspension upgrade for the 1999 BMW M3. This kit includes four Bilstein B12 Pro-Kit shocks/struts and four matching lowering springs. The shocks/struts feature a monotube design for superior handling and ride comfort, while the progressive-rate springs reduce body roll and improve cornering. The kit also includes bump stops, dust boots, and mounting hardware for a complete installation. This suspension kit is designed to provide improved handling and a sportier ride for the 1999 BMW M3.