Description
The K&N Filters Universal Rubber Air Filter – 3″ FLG x 5″ B x 4-5/8″ T x 4″ H (KNNRU-3700) is engineered to boost engine airflow and improve filtration across a wide range of vehicles. With a 3-inch flange, 5-inch base diameter, 4.625-inch top diameter, and 4-inch height, this universal tapered filter offers a custom fit for multiple intake setups. Designed for durability and long service intervals, it features a washable and reusable oiled cotton gauze filter media. The rubber flange and flexible base help it seal tightly on many intake tubes. This K&N Filters Universal Rubber Air Filter is ideal for those seeking a reliable, long-lasting solution for performance intake systems.
Features and Specifications:
- Flange Inside Diameter: 3 inches
- Base Outside Diameter: 5 inches
- Top Outside Diameter: 4.625 inches
- Height: 4 inches
- Engineered Power: Advanced air filter media enhances horsepower, acceleration, and overall engine performance.
- Superior Protection: Two 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 50,000 miles, equivalent to about three 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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