The AST Suspension 2019+ Audi A3 / S3 Quattro Adjustable Lowering Springs - 25mm are designed to improve the handling performance and aesthetics of your vehicle. These springs are 25mm lower than stock and feature adjustable ride height. They are constructed from high quality steel and are corrosion resistant. They provide a firmer, more responsive ride and improved cornering capabilities. They also reduce body roll and squat during acceleration. These springs are a great way to improve the overall performance and look of your vehicle.