AST Suspension Lowering Springs (40mm/40mm) - 1977-1981 BMW 5 Series 518/520/525/528i/535i (E12)

The AST Suspension Lowering Springs for the 1977-1981 BMW 5 Series (E12) are high-performance coil springs designed to reduce ride height by 40mm. Crafted from premium high tensile chromium-silicone wire, these springs are selected for their strength and consistency by AST engineers. Each spring undergoes a meticulous manufacturing process, including cold winding, heat treatment to enhance hardness and minimize internal stresses, and individual shot peening. The springs are phosphate treated and powder coated to ensure durability and longevity, even beyond the vehicle's lifespan. Featuring progressive rates on most applications, these springs improve handling, stability, and aesthetics by lowering the center of gravity for a sportier stance.

Designed specifically for 1977-1981 BMW 5 Series models, including 518, 520, 525, 528i, and 535i, these springs are a direct replacement upgrade for factory components. They are suitable for street use and performance driving, offering improved cornering and reduced body roll. Installation is straightforward as they are bolt-on components compatible with the original suspension setup. The kit includes the lowering springs themselves, with no additional components required. These springs are ideal for enthusiasts seeking a lowered stance and enhanced driving dynamics on street and light track applications.