AST Lowering Springs 35mm/35mm E39 Touring w/ Air Suspension (ASTLS-14-429) (SPF14-429) YMM_1973_1979_Ford_F_100_VI The Rigid A-Pillar Mount Kit

The Rigid A-Pillar Mount Kit is designed for a straightforward

providing a more engaging driving experience without compromising ride comfort on daily roads

The design incorporates comprehensive finite element analysis

simplifying tire rotation and maintaining balanced handling characteristics

AST Lowering Springs 35mm/35mm E39 Touring w/ Air Suspension (ASTLS-14-429) (SPF14-429) YMM_1973_1979_Ford_F_100_VI The Rigid A-Pillar Mount KitAST Lowering Springs for the 1997 2004 BMW 5 Series (E39) 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.