AST 05-02/2012 BMW 3 Lowering Springs - 30mm/20mm

AST Lowering Springs for the 2005-2012 BMW 3 Series (E90) are manufactured from a premium high tensile chromium-silicone wire which is handpicked by AST engineers for its quality and metal consistency. Each spring is cold wound and then heat treated to increase hardness and reduce internal stresses present after winding. Each spring is then individually shot peened, phosphate treated and then powder coated to outlast even the life of the vehicle. Features include progressive rates on most vehicles, EDC Compatibility (if applicable), individual blocking and computer testing prior to shipping, and a lifetime warranty on breaking. Most applications are TUV Certified.