The DNA high-flow air filter for the Nissan Skyline R31 is designed to increase horsepower and acceleration while filtering the air. It is washable and reusable, and is designed to fit the factory airbox.
- Type: High-flow air filter
- Car make: Nissan
- Car model: Skyline R31
- Year: 1985–1989
- Engine: 2.0 DOHC Turbo
- Reusable: Washable
- Fitment: Factory airbox