AST BMW M4 Lowering Springs (G82)Want to give your G82 M4 that extra stance? The AST 30mm Drop to both the Front and Rear Springs gives the perfect fitment with either OEM or aftermarket wheels. AST Lowering Springs 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