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2003 Mazda MX-5 Miata (NB)
the ST coilovers are road tested to meet the highest standards of the German TUV
Spline Size (Millimeters): 22
Performance & Monitoring
Manufactured to strict quality control standards
AST Lowering Springs 35mm/35mm E39 Sedan (ASTLS-14-423) (SPF14-423) Exclusive - 2007-2026 Fiat 500 2003 Mazda MX-5 Miata (NB)AST Lowering Springs for the 1995 2003 BMW 5 Series (E39) 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.