AST Suspension Lowering Springs (30mm/30mm) - 2003-2010 BMW 5 Series 540i/550i Sedan (E60)

The AST Suspension Lowering Springs for the 2003-2010 BMW 5 Series (E60) are high-performance coil springs designed to lower the vehicle's ride height by 30mm. Crafted from premium high tensile chromium-silicone wire, these springs are selected for their strength and consistency by AST engineers. 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 feature progressive rates on most vehicles, providing a balance of improved handling and ride comfort. They are engineered to deliver enhanced stability, reduced body roll, and a sportier stance, making them ideal for enthusiasts seeking performance upgrades.

Designed specifically for 2003-2010 BMW 5 Series models, including the 540i and 550i sedans, these springs are a direct replacement for the factory components. They are compatible with vehicles equipped with Electronic Damping Control (EDC), offering a seamless fit and straightforward installation. The springs are intended for street and performance driving, providing a lowered stance that improves handling without sacrificing daily comfort. Installation involves replacing the original springs with these units, and the kit includes the set of lowering springs. Suitable for enthusiasts aiming to enhance their vehicle’s appearance and handling characteristics, these springs are a durable upgrade for street-driven BMW E60 models.