The DNA high-flow air filter for the Smart Forfour is designed to fit in the factory airbox. It is washable and reusable, and is designed to increase horsepower and acceleration while providing filtration.
- Type: High-flow air filter
- Compatibility: Smart Forfour
- Installation: In the factory airbox
- Reusable: Yes, washable
- Features: Increased horsepower and acceleration, filtration