The AST lowering spring set for BMW 4 built between October 2013 and October 2020 lowers ride height and reduces center of gravity while keeping much of the OEM comfort. Cold‑coiled on high‑quality Wafios machines and featuring a progressive wind, these springs provide a balanced lowered stance and improved handling. Supplied as direct OEM replacements, they carry a lifetime breakage warranty and cover thousands of compatible applications.
AST 10/2013-10/2020 BMW 4 Lowering Springs - 35mm/30mm