6.063-Inch Round Tapered Air Filter

The K&N E-1987 is a high-performance, reusable air filter engineered to enhance your vehicle's horsepower and acceleration through superior airflow and filtration. Its unique construction utilizes 4 to 6 layers of cotton gauze, treated with a special oil to create a tacky surface that effectively traps dirt and debris. This layered design ensures high airflow and consistent performance, even as the filter accumulates contaminants, unlike restrictive paper filters. Crafted from durable cotton gauze and protected by aluminum wire screens, the E-1987 offers exceptional filtration, capturing particles smaller than the filter media's holes. It is designed to last up to 50,000 miles before requiring cleaning, depending on driving conditions. The filter's dimensions include a height of 6.063 inches, a base outside diameter of 6 inches, and a flange inside diameter of 3.625 inches, with a round tapered shape and a centered flange type. It is emissions legal in all 50 US states and is backed by K&N's famous Million-Mile Limited Warranty, ensuring it is the last air filter your vehicle will need. The K&N E-1987 is compatible with a range of Audi models, including the A3, A4, A4 Quattro, A5, A5 Quattro, Q5, S4, S5, and SQ5, generally from the 2007-2017 model years, though specific year ranges may vary by trim and engine.