AST Suspension Lowering Springs (50mm/40mm TUV) - 1998-2006 BMW 3 Series 320D/6CYL Coupe (E46)

The AST Suspension Lowering Springs for the 1998-2006 BMW 3 Series (E46) are high-performance coil springs designed to lower the vehicle's ride height by 50mm front and 40mm rear. Constructed from premium high tensile chromium-silicone wire, these springs are carefully handpicked by AST engineers for their quality and consistency. The manufacturing process involves cold winding, heat treatment to enhance hardness and reduce internal stresses, followed by shot peening, phosphate treatment, and powder coating to ensure durability and corrosion resistance. These springs provide a progressive rate on most vehicles, improving handling, stability, and aesthetics while maintaining ride comfort.

Designed specifically for the E46 chassis, these springs are compatible with 1998-2006 BMW 3 Series models, including the 320D and 6-cylinder coupe variants. They serve as an effective upgrade for enthusiasts seeking improved cornering performance and a sportier stance without sacrificing daily drivability. Installation is a direct bolt-on replacement for stock springs, offering a straightforward upgrade. The kit includes the set of lowering springs, with no additional components required. Ideal for street and spirited driving, these springs enhance vehicle dynamics while maintaining reliability and longevity.