The K&N E-9172 air filter is a high-flow air filter for the Mini Cooper and Mini Rover 1300, for model years 1991–2001. It is washable and reusable, made with multiple layers of oil-impregnated cotton, and designed to increase horsepower, improve acceleration, and enhance overall engine performance.
- Type: High-flow air filter
- Material: Multiple layers of oil-impregnated cotton
- Features: Washable and reusable
- Compatibility: Mini Cooper, Mini Rover 1300, 1991–2001