AST Suspension Lowering Springs (30mm/30mm) - 2014+ BMW M4 Competition Cabriolet (F83) XJ12 Part Number N282D Part Name

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AST Suspension Lowering Springs (30mm/30mm) - 2014+ BMW M4 Competition Cabriolet (F83) XJ12 Part Number N282D Part NameAST Lowering Springs for the 2014+ BMW M4 (F83) 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