AST Suspension Lowering Springs (40mm/40mm) - 1990-1994 BMW 5 Series 525iX Allroad 4WD (E34) control-arms Our ST Anti-Sway Bars for

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AST Suspension Lowering Springs (40mm/40mm) - 1990-1994 BMW 5 Series 525iX Allroad 4WD (E34) control-arms Our ST Anti-Sway Bars forAST Lowering Springs for the 1990 1994 BMW 5 Series (E34) 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.