57i Series Performance Air Intake Kit

The K&N 57i Series performance air intake system is engineered to enhance your vehicle's performance by replacing the restrictive factory air box with a less restricted, high-flow design. The kit includes a large, red cotton gauze air filter with a round outlet, a black flex hose intake pipe, and steel clamps. The increased surface area of the K&N filter allows for greater airflow and a longer service life, potentially up to 100,000 miles before cleaning is needed, depending on driving conditions. Installation is designed to be straightforward, typically completed in 90 minutes or less. The 57i Series intake is guaranteed to increase horsepower and is designed to improve throttle response and engine sound. It comes with K&N's No-Hassle Lifetime Limited Warranty. However, it's important to note that this intake system is not street legal for use in California and other US states that adopt California emission standards. The product style is identified as Gen I and 57i Series International Kits, with a replacement filter part number RU-5128. This K&N 57i Series intake system is compatible with 1987-1993 BMW 3-Series models equipped with 2.0L or 2.5L engines, including RWD variants of the 320i and 325i, as well as AWD variants of the 325iX. Always confirm specific fitment for your vehicle's year, make, model, and trim using the provided compatibility tools. Ensure all parts are present and correct before beginning installation to avoid delays.