K&N Filters universal rubber air filter details
K&N Filters Universal Rubber Air Filter – 2-1/16" FLG x 3-1/2" OD x 6" H (KNNRA-0520)
The K&N Filters Universal Rubber Air Filter – 2-1/16" FLG x 3-1/2" OD x 6" H (KNNRA-0520) is designed for high airflow and durability in custom or universal applications. Built with a flexible rubber flange to fit a 2-1/16" (54mm) intake and a 3.5" outer diameter, this filter supports efficient filtration while maintaining consistent engine performance. With a total height of 6 inches, it is ideal for compact engine bays where space is limited. Designed by K&N Filters, an industry leader in performance air filtration, this part offers reliable and reusable air filtration in a wide range of setups. This is an oiled cotton gauze filter designed to be washable and reusable, ensuring a long service life and cost-effectiveness.
Features and Specifications:
Flange Inside Diameter: 2-1/16 inches (approx. 54mm)
Outer Diameter: 3.5 inches
Height: 6 inches
Top Style: Rubber
Enhanced Performance: Increases horsepower, acceleration, and overall engine efficiency.
Advanced Filtration: Features 4 layers of premium cotton gauze treated to trap harmful contaminants.
Durable Build: Constructed with high-quality materials for long-lasting performance.
Low Maintenance: Requires cleaning only every 75,000 miles under normal highway conditions.
Easy Installation: Pre-oiled and ready to use for a fast, effective upgrade.
Universal Fit: Compatible with a wide range of applications.
Eco-Friendly: Reusable design helps reduce landfill waste from disposable filters.
Product identification
- Brand: K&N Filters
- Model / MPN: KNNRA-0520




