Description
The K&N Filters Universal Rubber Air Filter – 3″ FLG x 6″ B x 5″ T x 6-1/2″ H (KNNRU-4730) is designed for custom applications requiring a reliable and efficient air intake solution. Built with high-flow performance, this universal filter features a 3-inch flange, 6-inch base, 5-inch top inlet diameter, and 6.5-inch height to fit a wide range of engine bay setups. Made with durable rubber construction, it ensures a secure seal and long-lasting use. It is ideal for automotive enthusiasts looking to maintain clean airflow in tight spaces.
Features and Specifications:
- Flange Inside Diameter: 3 inches
- Base Outside Diameter: 6 inches
- Top Outside Diameter: 5 inches
- Height: 6-1/2 inches
- Engineered Power: Advanced air filter media enhances horsepower, acceleration, and overall engine performance.
- Superior Protection: Four layers of premium cotton gauze with a specialized tacking agent trap harmful contaminants effectively.
- Durable Construction: Built with high-quality materials and precision manufacturing for long-lasting performance.
- Long Service Life: Under normal highway conditions, it requires cleaning only every 75,000 miles, equivalent to about five years.
- Easy Installation: Pre-oiled and ready to use, making it a simple and cost-effective upgrade for better performance.
- Versatile Fitment: Designed for compatibility with a wide range of applications.
- Eco-Friendly: Reusable design helps reduce landfill waste from disposable filters.
- Reliable Warranty: Backed by a 1-year limited warranty for peace of mind.





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