G90/G99 BMW M5 AST Lowering Spring SetTransform your M5's dynamics with AST's G90 lowering spring setengineered for those who refuse to compromise. Built from high tensile chromium silicone wire and validated through rigorous computer testing, these springs eliminate settling issues while maintaining a progressive rate that keeps your ride composed on any road. Drop 25mm up front and 20mm in back to achieve that commanding stance, sharper aerodynamics, and tighter wheel gaps without