AST BMW G29 Z4 M40i Roadster Lowering Springs BFCM_X3 M (F97) providing a boost in power

providing a boost in power and reliability

BMW F20/F21 – M135i

*Only fits 2WD cars with electronic dampers

The larger radiator can be used with the original chargecooler to improve running temperatures however

these lowering springs are designed to enhance your driving experience like never before

AST BMW G29 Z4 M40i Roadster Lowering Springs BFCM_X3 M (F97) providing a boost in powerGive your BMW G29 Z4 M40i Roadster 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