AST BMW G29 Z4 M40i Roadster Lowering Springs CLA It is the smart remap

It is the smart remap alternative for drivers who want more pace without opening the ECU

30 TFSI Mild Hybrid

robust solution trusted on enthusiast and modified E71 cars

4 Series F32 F33 F36 2014 to 2019

AST BMW G29 Z4 M40i Roadster Lowering Springs CLA It is the smart remapGive 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