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2018 BMW 4 Series 428i/430i Coupe RWD (w/ EDC)
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AST Suspension Lowering Springs (35mm/35mm) - 1988-1997 BMW 5 Series 518i/520i/525TD/525TDS Touring (E34) 640i 2018 BMW 4 Series 428i/430iAST Lowering Springs for the 1988 1997 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.
