K&N Custom Round Air Filter 5-1/8" Flange – 11" Diameter, 4.75" Height w/ Vent | High Flow Washable Filter
K&N Custom Round Air Filter 5-1/8" Flange – 11" Diameter, 4.75" Height w/ Vent | High Flow Washable Filter is backordered and will ship as soon as it is back in stock.
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Improve engine breathing and performance with the K&N custom round air filter, engineered for high airflow and long term durability. Featuring a universal 5-1/8" flange, this filter is commonly used on carbureted engines, making it an ideal choice for hot rods, muscle cars, and custom intake setups.
With an 11-inch diameter and 4.75-inch height, this filter provides increased surface area for improved airflow compared to smaller filters. The integrated vent allows for crankcase breather hose connection, helping maintain proper engine ventilation in performance applications.
K&N’s signature high-flow cotton gauze media is washable and reusable, delivering long service life while maintaining consistent airflow. Unlike disposable filters, this unit can be cleaned and reused multiple times, making it a cost-effective upgrade for enthusiasts.
Whether you're building a classic V8, tuning a carbureted setup, or upgrading a custom intake system, this K&N round air filter offers proven performance and reliability.
Proposition 65 Warnings.
Cancer and Reproductive Harm. See details below.
Items that are not CARB Legal will not be sold and ship to California or CARB states.
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