AST Suspension Lowering Springs (30mm/30mm) - 2003-2010 BMW 5 Series 540i/550i Sedan (E60) kw-suspension-variant-3-coilover-kit GT (Zeta) are maintained while

GT (Zeta) are maintained while delivering an improved gear shift resulting in reduced initial torque loss and greater power transfer to the wheels

Part Number KCA394 Part Name Control Arm Bushing Vehicle 2000-2004 Ford Focus LX

2018 Mini Cooper Hardtop 2 Door 1

The ideal spring rate for every car

2008 Lexus GS460 RWD (S190)

AST Suspension Lowering Springs (30mm/30mm) - 2003-2010 BMW 5 Series 540i/550i Sedan (E60) kw-suspension-variant-3-coilover-kit GT (Zeta) are maintained whileAST Lowering Springs for the 2003 2010 BMW 5 Series (E60) 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.