The Mishimoto cold air intake for 1999–2005 BMW E46 323i/325i/328i is a bolt-on performance intake that improves induction flow and produces a more aggressive tone under load. It uses the stock intake duct to feed a high-flow oiled filter with increased surface area; the filter is washable and reusable. A steel heatshield with pre-assembled rubber trim helps keep hot engine air out, and the kit installs in about an hour while remaining compatible with the stock tune.
Mishimoto 99-05 BMW E46 323i/325i/328i Performance Cold Air Intake Kit - Black