AST Suspension Lowering Springs (30mm/30mm TUV) - 2017+ BMW 5 Series 520i/530i/518D/520D Touring w/ Air Suspension HA (G31) ksport-kontrol-plus-2-way-adjustable-coilovers Fewer coils reduce unsprung weight

Fewer coils reduce unsprung weight and maximize usable shock stroke

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AST Suspension Lowering Springs (30mm/30mm TUV) - 2017+ BMW 5 Series 520i/530i/518D/520D Touring w/ Air Suspension HA (G31) ksport-kontrol-plus-2-way-adjustable-coilovers Fewer coils reduce unsprung weightAST Lowering Springs for the 2017+ BMW 5 Series (G31) 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. Features