AST Lowering Springs 25mm/15mm | BMW 3 Series F30 (15-19) (ASTLS-18-006) E9X 3-SERIES these air ducts feature a

these air ducts feature a durable

aggressive look while supporting improved airflow management at the rear of your car

it provides an eye-catching finish that complements the vehicle’s lines while resisting the elements

Enhanced protection against harsh road elements

aligning with the M5 styling cues

AST Lowering Springs 25mm/15mm | BMW 3 Series F30 (15-19) (ASTLS-18-006) E9X 3-SERIES these air ducts feature aAST Lowering Springs for the 2015 2019 BMW 3 Series (F30) 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.