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ensuring a seamless installation process and reliable performance
facilitating straightforward installation using standard tools
making it a versatile choice for many popular models
which is critical when using stiffer aftermarket sway bars or adjusting suspension geometry for performance driving
AST 30/30mm Lowering Springs | BMW 4 Series F32 (13-17) (ASTLS-18-059) YMM_1998_2006_Audi_TT_8N ensuring a seamless installation processAST Lowering Springs for the 2013+ BMW 4 Series (F32) 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