K&N Universal Clamp-On Air Filter 6in Flange / 7-1/2in Base / 4-1/2in Top / 6in Height

K&N Universal Clamp-On Air Filter – 6" Flange, 7.5" Base, 4.5" Top, 6" Height | High-Flow Performance Air Filter

Boost airflow & horsepower with the K&N Universal Clamp-On Air Filter. Features a 6-inch flange, 7.5-inch base, and a washable, reusable oiled cotton design.

The K&N Universal Clamp-On Air Filter (Part # RU-1048) is engineered to deliver high air flow while maintaining exceptional filtration efficiency. Constructed with multi-layered, oiled cotton gauze filtration media, this round tapered air filter maximizes surface area to supply your engine with clean, dense oxygen for increased horsepower and faster throttle response.

Designed with a pliable molded rubber flange, this filter absorbs heavy engine vibrations and provides a secure, leak-free seal on custom air intake tubes. The flexible flange material can stretch up to 1/16 inch (1.5 mm) to fit slightly off-size tubing. Built to last for the lifespan of your vehicle, this filter is fully washable and reusable, offering a sustainable alternative to disposable paper filters.

Best Uses

1. Custom Cold Air Intake Systems: Ideal for custom engine swaps, custom intake setups, and aftermarket performance tubes requiring a 6-inch flange inlet.
2. Motorsports & Racing Applications: Delivers maximum high-flow air supply under high-RPM racing conditions.
3. Off-Road & Performance Vehicles: Suitable for high-horsepower trucks, SUVs, and custom track vehicles built for demanding environments.
4. Restomods & Hot Rods: Perfect for engine bays with tight vertical height constraints where a 6-inch filter height is required.

Features

1. High-Flow Cotton Gauze Media: Engineered with multiple layers of oiled cotton gauze to maximize airflow while trapping fine dirt contaminants.
2. Pliable Molded Rubber Flange: Absorbs engine vibration and stretches up to 1/16 in (1.5 mm) for a snug, vibration-resistant fit.
3. Washable & Reusable Design: Easily cleanable and re-oilable for thousands of miles of performance.
4. Round Tapered Geometry: 7.5-inch base tapering down to a 4.5-inch top for high filtration surface area in compact engine bays.
5. Universal Clamp-On Mounting: Attaches directly to 6-inch OD intake pipes with a standard heavy-duty hose clamp.

Benefits

1. Increased Horsepower & Acceleration: High-flow media reduces intake restriction, improving throttle response and engine output.
2. Long-Term Cost Savings: Eliminates the ongoing cost of buying disposable paper filters over time.
3. Superior Engine Protection: Advanced filtration captures harmful dust, dirt, and debris to safeguard engine components.
4. Eco-Friendly Waste Reduction: Helps reduce landfill waste generated by single-use paper air filters.
5. Hassle-Free Maintenance: Designed for long service intervals before requiring cleaning under normal driving conditions.