The AST lowering spring set for BMW 4 built between March 2014 and July 2021 lowers ride height and reduces center of gravity while preserving much of OEM comfort. Cold‑coiled on top‑quality Wafios coilers with a progressive winding, these vehicle‑specific springs balance a lowered stance and handling. Offered as direct OEM replacements, they are backed by a lifetime warranty against breakage and suit thousands of applications.
AST 03/2014-07/2021 BMW 4 Lowering Springs - 20mm/20mm