AST BMW F83 M4 Cabriolet Lowering Springs 3 Series (F30 / F31) The result is repeatable alignment

The result is repeatable alignment and balance

BMW 2 Series Active Tourer adjustable ride height

BMW F40 rear splitter carbon

Four-piston calipers with OE pads

5 bar MAP conversion lead

AST BMW F83 M4 Cabriolet Lowering Springs 3 Series (F30 / F31) The result is repeatable alignmentGive your BMW F83 M4 Cabriolet the extra stance it needs with AST lowering springs. 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 spring is then individually shot peened, phosphate treated, and then powder