K&N Filters universal rubber air filter details
K&N Filters Universal Rubber Air Filter – 4-1/2" FLG x 5-7/8" B x 4-1/2" T x 6" H (KNNRU-4740)
The K&N Filters Universal Rubber Air Filter – 4-1/2" FLG x 5-7/8" B x 4-1/2" T x 6" H (KNNRU-4740) is designed to provide excellent filtration and airflow for various custom and performance applications. With a 4.5-inch inlet, 5.875-inch base, 4.5-inch top, and 6-inch height, this air filter is ideal for universal fitment across multiple vehicle types. Built with high-quality rubber construction, it ensures durability and flexibility under demanding conditions. The washable and reusable design makes it an eco-friendly and cost-effective choice for long-term use. Whether building a custom intake or replacing an old filter, this universal rubber air filter is a dependable solution for high-performance filtration needs.
Features and Specifications:
Flange Inside Diameter: 4-1/2 inches
Base Diameter: 5-7/8 inches
Top Diameter: 4-1/2 inches
Height: 6 inches
Engineered Performance: Advanced filter media enhances horsepower, acceleration, and efficiency.
Multi-Layer Protection: Four layers of premium cotton gauze with tack agent trap harmful contaminants.
Durable Build: Constructed with high-quality materials and cutting-edge methods for long-lasting use.
Low Maintenance: Requires cleaning only every 75,000 miles under normal highway conditions.
Simple Installation: Pre-oiled and ready to install for quick performance improvements.
Versatile Fit: Universal design suits a wide range of vehicles and applications.
Eco-Friendly: Reusable design helps reduce landfill waste from disposable filters.
Product identification
- Brand: K&N Filters
- Model / MPN: KNNRU-4740




