The Audi A4 B9 is a worthy challenger to the other luxury sedans, with some reviewers even giving it the edge over its rivals. Featuring a quiet interior, where almost no engine noise is noticeable, the A4 is even more luxurious than ever. It's built to be economical and easy to handle over long drives, but where's the sporty drive that you'd expect from an Audi? That's where Air Lift Performance is here to help. In order to give you that missing performance, we swapped out the front OEM suspension for our double-bellow air springs, paired with threaded-body, monotube shocks. Air Lift Performance dampers are completely customizable to your needs, with 30 levels of adjustment in order for you to perfectly tailor your air suspension to your performance needs. These elements work together to provide a comfortable ride and superior body support, combining to provide you with the ability to air out 126mm from stock. As the leader in air suspension products for more than 65 years, Air Lift Company and its Performance division shows its commitment to delivering quality parts that last by torture-testing all of the major kit components on our in-house validation equipment. With a one-year, unlimited-mileage warranty -- not to mention the Air Lift Performance reputation for great customer service and technical support -- you can purchase this kit with peace of mind.