The AST BMW 2018+ M340 (G20) Lowering Springs 30mm drop are designed to improve the handling and performance of the BMW M340. These springs are crafted from high-quality materials and feature a 30mm drop that will lower the car's center of gravity and reduce body roll. The springs are designed to provide a comfortable ride while also providing improved cornering and handling. The springs are also corrosion-resistant and feature a lifetime warranty.