K&N Universal Clamp-On Air Filter 4in FLG / 6-1/2in B / 4-1/2in T / 7in H

K&N Universal Clamp-On Air Filter | 4" Flange, High-Flow Performance

Upgrade engine airflow with the K&N Universal Clamp-On Air Filter (4" Flange, 6.5" Base, 4.5" Top, 7" Height). Pre-oiled, washable, and built for durability.

The K&N Universal Clamp-On Air Filter is engineered to increase horsepower and acceleration while providing engine protection. Featuring a 4-inch flange diameter, 6.5-inch base diameter, 4.5-inch top diameter, and a 7-inch height, this round tapered cone filter delivers significantly higher airflow compared to standard paper filters.

Constructed with premium oiled cotton gauze filter media sandwiched between aluminum wire mesh, it traps dirt and debris effectively while maintaining low air restriction. Its durable molded rubber flange absorbs vibrations and ensures a tight, secure clamp-on fitment on custom intakes. The filter comes pre-oiled and ready to install, and it is fully washable and reusable for long-term reliability.

Best Uses

1. Custom Cold Air Intakes: Perfect for DIY intake builds requiring a 4-inch inlet pipe.
2. Performance & Race Vehicles: Maximizes high-RPM airflow in track cars, drag racing builds, and modified street vehicles.
3. Engine Swaps & Custom Hot Rods: Easily mounts to custom tube fabrications where factory air boxes are removed.
4. Off-Road & Specialty Equipment: Suitable for custom trucks, buggies, generators, and tractors requiring heavy-duty, reusable filtration.

Features

1. High-Flow Cotton Media: Premium multi-layer oiled cotton gauze engineered for maximum airflow.
2. Ultra-Strong Rubber Flange: Flexible, molded rubber absorbs engine vibration and creates a leak-free clamp fit.
3. Washable & Reusable: Designed to be cleaned and re-oiled multiple times using a K&N cleaning kit.
4. Round Tapered Geometry: 6.5" base tapering to a 4.5" top with a 7" height for optimized clearance in tight engine bays.
5. Pre-Oiled Ready Out of the Box: Factory-oiled so you can clamp it on and drive immediately.

Benefits

1. Boosts Engine Horsepower & Acceleration: Reduces intake restriction to deliver noticeable throttle response improvements.
2. Long-Term Cost Savings: Eliminates the need to buy disposable paper filters over the lifetime of your vehicle.
3. Exceptional Contaminant Protection: Traps harmful dust, dirt, and debris to safeguard internal engine components.
4. Eco-Friendly Choice: Reusable design reduces automotive filter waste sent to landfills.
5. Hassle-Free Direct Clamp Installation: Secures quickly using standard hose clamps without requiring special tools.  

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