The DNA high-flow air filter for the Audi S4 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
- Fitment: Audi S4 8W/B9 TDI Mild Hybrid 3.0, 2019–2023
- Installation: In the factory airbox
- Maintenance: Washable and reusable