The DNA Alpina Roadster S Z4 3.4i filter is a free-flow air filter that fits in the existing factory airbox. It is washable and reusable, and is designed to increase horsepower and acceleration while providing filtration.
- Type: Free-flow air filter
- Compatibility: BMW Z4
- Installation: In the factory airbox
- Cleaning: Washable
- Reusability: Reusable