The DNA air filter is a free-flow filter for the factory air box of the BMW E46. It is washable and reusable, and is designed to fit into the existing filter frame.
It is designed to increase horsepower and acceleration while providing filtration.
- Type: Free-flow air filter
- Compatibility: BMW E46 323i, 1998–2000
- Washable: Yes
- Reusable: Yes