AST Suspension Lowering Springs (40mm/30mm TUV) - 2000-2007 BMW 3 Series 320D/6CYL Cabrio (E46)

The AST Suspension Lowering Springs for the BMW 3 Series (E46) are high-performance components designed to improve handling and aesthetics by lowering the vehicle's ride height by 40mm front and 30mm rear. Constructed from premium high tensile chromium-silicone wire, these springs are carefully handpicked by AST engineers for their consistent quality and durability. 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 longevity and resistance to corrosion. These springs feature progressive rates on most vehicles, providing a balance of comfort and performance, and are engineered to withstand the rigors of daily driving and spirited handling.

Designed specifically for 2000-2007 BMW E46 3 Series models, including the 320D and 6-cylinder Cabrio variants, these springs are a direct replacement for factory components. They are compatible with vehicles equipped with Electronic Damping Control (EDC), offering an upgrade that enhances cornering stability and overall driving dynamics. Installation is straightforward as bolt-on replacements, making them suitable for enthusiasts seeking a lowered stance and improved handling on street or track. The kit includes the springs necessary for both front and rear suspension, ensuring a comprehensive upgrade for your BMW E46.