The DNA R-AD29RS25-0R air filter is a high-flow filter designed to fit in the factory airbox of the Audi A4. It is washable and reusable, and is designed to increase horsepower and acceleration while providing filtration.
- Type: High-flow air filter
- Manufacturer: DNA
- Compatibility: Audi A4 8W/B9 30 TDI Mild Hybrid 2.0 (2019–2025)
- Use: Washable and reusable
- Installation: In the factory airbox
- Design: Designed to increase horsepower and acceleration