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The ST XA coilover kit for BMW M440i 4WD xDrive (without electronic dampers) delivers adjustable height and damping to sharpen response while retaining everyday comfort. The kit includes vehicle‑matched tuning with 16 clicks of rebound adjustment and factory dyno presets. Composite spring perches with stainless inserts prevent corrosion and galvanized struts plus sealing packages extend service life.
ST XA Coilover Kit BMW M440i 4WD xDrive w/o Electronics Dampers
