AST Lowering Springs 45mm/30mm | BMW 1 Series 08-13 (ASTLS-14-320)AST Lowering Springs 45mm 30mm Part #: ASTLS 14 320 Overview The AST Lowering Springs 45mm 30mm are designed to enhance the stance and handling of your vehicle by lowering the ride height for a more aggressive look and improved performance. Crafted for enthusiasts seeking a balanced combination of style and ride quality, these springs are suitable for a variety of driving conditions. They help reduce body roll, improve cornering response, and provide