K&N Filters universal rubber air filter details
K&N Filters Universal Rubber Air Filter – 3-1/2" FLG x 5" B x 3-1/2" T x 4" H (KNNRU-2990)
The K&N Filters Universal Rubber Air Filter – 3-1/2" FLG x 5" B x 3-1/2" T x 4" H (KNNRU-2990) is built for engines requiring a durable and reusable air intake filter. With its universal round tapered shape and flexible rubber flange, this filter is ideal for custom or performance applications. It features a 3.5-inch inlet and top, a 5-inch base, and a 4-inch height, making it compatible with a wide range of intake systems. K&N Filters are engineered for maximum airflow and protection while being washable and reusable, reducing long-term maintenance costs.
Features and Specifications:
Flange Inside Diameter: 3-1/2 inches
Base Outside Diameter: 5 inches
Top Outside Diameter: 3-1/2 inches
Height: 4 inches
Engineered Performance: Designed to boost horsepower, acceleration, and overall engine efficiency.
Advanced Filtration: Features four layers of premium cotton gauze for superior contaminant blocking.
Durable Build: Constructed with rugged, high-quality materials for long-lasting use.
Low Maintenance: Requires cleaning only every 75,000 miles under normal highway conditions.
Easy Installation: Pre-oiled and ready to install for quick performance gains.
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: KNNRU-2990




