Description

The K&N Filters Universal Air Filter – 9″ OD x 7-1/2″ ID x 4″ H (KNNE-3640) is engineered for high airflow and filtration efficiency, making it ideal for custom and performance intake setups. Designed with a 9-inch outside diameter, 7.5-inch inside diameter, and a 4-inch height, this filter supports a wide range of applications that require precise fit and airflow performance. Whether used in automotive or industrial settings, this washable and reusable air filter helps improve engine performance while providing durable construction and long service life.

Features and Specifications:

Air Filter Material: Cotton Gauze
Outside Diameter: 9 inches
Inside Diameter: 7.5 inches
Height: 4 inches
Air Filter Shape: Round
Increased Horsepower: Boosts engine performance by improving airflow.
Long-Lasting Design: Washable, reusable, and built to last the lifetime of the vehicle.
High Airflow: Provides exceptional filtration without restricting airflow.
Easy Fit: Engineered to drop into the factory air box with no modifications.
Warranty Coverage: Backed by a No-Hassle Lifetime Limited Warranty.
Low Maintenance: Requires cleaning only every 50,000 miles under normal highway use.
Emission Compliant: 50-state legal for emissions standards.
Warranty Safe: Will not void the vehicle’s manufacturer warranty.