Description

The K&N Filters Universal Rubber Air Filter – 3-3/4″ FLG x 5-3/8″ B x 4-3/8″ T x 5″ H (KNNRU-4250) is engineered to enhance airflow and protect engines across a wide range of universal applications. This rubber-topped air filter features a 3 3/4-inch flange, 4 3/8-inch inner diameter, and 5-inch height. It is ideal for custom intake systems and off-road setups where flexibility and performance are key. K&N’s high-flow filter media supports improved horsepower without compromising engine protection. It is compatible with clamp-on installation and reusable after cleaning.

Features and Specifications:

Flange Inside Diameter: 3 3/4 in
Base Outside Diameter: 5 3/8 in
Top Outside Diameter: 4 3/8 in
Filter Height: 5 in
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.