AST Suspension Lowering Springs - BMW 4-Series (07/2020-)AST Suspension Lowering Springs Part #: ASTLS 22 121 Overview The AST Suspension Lowering Springs are designed to enhance the handling and aesthetics of your BMW 4 Series (07 2020 ). Crafted for enthusiasts seeking a sportier stance and improved ride dynamics, these springs provide a balanced combination of performance and style. They are ideal for drivers looking to reduce body roll, improve cornering response, and achieve a more aggressive look