The K&N 99-05 BMW 3 Series Performance Intake Kit is designed to provide increased airflow and improved engine performance for BMW 3 Series vehicles from 1999-2005. The kit includes a high-flow air filter, a mandrel-bent aluminum intake tube, and a heat shield to keep engine heat away from the filter. The air filter is designed to provide superior filtration while allowing more air into the engine, and the mandrel-bent aluminum intake tube helps to reduce turbulence and increase air velocity. This intake kit is designed to provide increased horsepower, torque, and improved fuel economy.