AST 40mm/35mm F&R Lowering Springs | BMW 3 Series F31 (2012-19) (ASTLS-14-400)AST Lowering Springs BMW 3 Series F31 (2012 19) Fitment Part #: ASTLS 14 400 Overview The AST 40mm 35mm F&R Lowering Springs are designed to enhance the stance and handling of your BMW 3 Series F31. Crafted for enthusiasts seeking improved aesthetics and performance, these springs provide a lower ride height that gives your vehicle a more aggressive look while maintaining ride comfort. They are ideal for drivers who want to improve handling dynamics,