The DNA air filter is a free-flow filter designed to fit in the factory airbox of the Citroen C4 Grand SpaceTourer. It is washable and reusable, and is designed to increase horsepower and acceleration while providing filtration.
- Type: Free-flow air filter
- Compatibility: Citroen C4, Citroen SpaceTourer
- Installation: In the factory airbox
- Reusable: Yes, washable