AST Suspension Lowering Springs (40mm/30mm TUV) - 1998-2006 BMW 3 Series 4CYL Coupe (E46) Impreza WRX Optimize Rear Suspension Geometry on

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Part Number BFR62Z Part Name Sway Bar Vehicle 2007 Ford Focus S

AST Suspension Lowering Springs (40mm/30mm TUV) - 1998-2006 BMW 3 Series 4CYL Coupe (E46) Impreza WRX Optimize Rear Suspension Geometry onAST Lowering Springs for the 1998 2006 BMW 3 Series (E46) 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.