KW A4 B9 Sedan 2WD 50mm H.A.S.

If you're looking to give your 2017-2020 Audi A4 a sportier stance and improved handling, KW's Height Adjustable Spring (H.A.S.) kit is a smart way to go. Unlike traditional lowering springs that lock you into one height, this kit lets you dial in the exact ride height you want, even after installation. It's designed to work seamlessly with your car's factory dampers, whether they're standard or electronic adaptive systems, so all your car's driver assistance and comfort features stay fully operational.

KW builds these springs from high-strength chrome-silicon steel, and they carefully match the spring rates to your Audi's specific damper characteristics and wheel loads. This ensures a balanced feel and more agile steering response without sacrificing the overall driving dynamics. The kit also includes vehicle-specific bump stops and dust protection to keep your factory suspension components safe from road debris. You get the benefit of a continuous, adjustable ride height, similar to a full coilover system, but with the convenience of using your existing shocks.

KW engineers test these spring kits extensively, including on the Nurburgring Nordschleife and in their own 7-post driving dynamics test center, to ensure they perform harmoniously with your vehicle. This kit is a well-built alternative to fixed lowering springs, offering a sporty look and feel while keeping your factory electronic suspension working perfectly.