The Bilstein 97-01 BMW 740i B3 OE Replacement Coil Spring - Rear is a direct replacement for the original rear coil spring on 1997-2001 BMW 740i models. It is designed to provide a smoother ride and improved handling. The spring is made of high-quality steel and is corrosion resistant for long-lasting durability. It is also designed to meet or exceed factory specifications for an exact fit.