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  • K&N Filter 4 inch Flange 6 3/4 inch OD Base 5 7/8 inch OD Top 9 1/2 inch Height
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K&N Filter 4 inch Flange 6 3/4 inch OD Base 5 7/8 inch OD Top 9 1/2 inch Height

K&N Engineering
KNNRU-5045
Auf Lager
Air Filters - Universal Fit
$104.99
K&N Universal Air Filter | 4" Flange, 9.5" Height (RU-5045) Boost airflow and horsepower with this reusable K&N Universal Air Filter. Features a 4" flange,...
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$104.99
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K&N Filter 4 inch Flange 6 3/4 inch OD Base 5 7/8 inch OD Top 9 1/2 inch Height
Description

K&N Universal Air Filter | 4" Flange, 9.5" Height (RU-5045)

Boost airflow and horsepower with this reusable K&N Universal Air Filter. Features a 4" flange, 6.75" base, 5.875" top, and 9.5" height. Washable & long-lasting.

Engineered to maximize horsepower and acceleration, this K&N Universal Clamp-On Air Filter delivers high airflow with outstanding filtration protection. Built with layered, oiled-cotton media and structured pleated mesh, it captures dust and debris while maintaining low airflow restriction.

The filter is designed with a durable, ultra-strong molded rubber flange that absorbs engine vibration and stretches up to 1/16" (1.5mm) to accommodate custom fitments. Designed for longevity, this filter is fully washable and reusable, eliminating the need for frequent disposable replacement filters.

Best Uses

  1. Custom Cold Air Intakes: Universal design works with aftermarket or custom 4-inch intake tubing.
  2. Performance & Racing Vehicles: Ideal for track, drag, or off-road builds that require maximum airflow.
  3. Forced Induction Systems: Fits high-volume setups like turbochargers or superchargers requiring a 4" inlet.
  4. Specialized Equipment: Great for high-performance engine conversions, generator upgrades, or custom engine swaps.

Features

  1. High-Flow Cotton Media: Oiled multi-layer cotton pleats offer high air volume while retaining particles down to microns.
  2. Flexible Molded Rubber Flange: Vibration-absorbing design that stretches up to 1/16" (1.5mm) for a secure, tight seal.
  3. Tapered Conical Design: 6.75" base tapering to 5.875" top allows fitment into tight engine bays while maximizing surface area.
  4. Washable & Reusable: Designed to be cleaned and re-oiled for thousands of miles, reducing waste and replacement costs.
  5. Clamp-On Installation: Comes ready to install directly onto standard 4" outer-diameter piping.

Benefits

  1. Increased Horsepower & Throttle Response: Lower restriction allows your engine to draw air more freely, enhancing power delivery.
  2. Engine Protection: Meets or exceeds 97%–99% filtration efficiency standards, protecting engine internals from damaging contaminants.
  3. Long-Term Cost Savings: Reusable filter eliminates the recurring cost of disposable paper filters.
  4. Custom Fit Flexibility: Pliable rubber flange handles minor sizing differences and dampens engine vibration.
  5. Environmentally Friendly: Reduces waste sent to landfills compared to single-use air filters.




This Part Fits:


Year Make Model Submodel
2008-2009 Toyota Sequoia SR5
2007-2009 Toyota Tundra Base
2007-2009 Toyota Tundra Limited
2007-2009 Toyota Tundra SR5
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1. Shipments to the Contiguous 48 US States Orders $149.99 and over qualify for our fast free shipping offer. We have worked with our shipping companies and integrated their shipping prices with our website for customer comfort.

2. Please see our International Orders page for orders shipping outside the US. We have worked with our shipping companies and integrated their shipping prices with our website for customer comfort.

3.For a specific delivery ETA based on the exact item(s) you want to purchase, please call us at (248) 832-2444 or message us via Chat before placing an order.

Returns:

1. Returned products must be in new, unused condition and include the original box and/or packaging with all tags included.

2. Once your return is received and inspected by MotoKarMax (usually within 48-72 hours of receiving), your refund will be processed and a credit will be applied to your credit card or original payment method. Please note that depending on your credit card company, it may take an additional 2-10 business days after your credit is applied for it to be posted to your account.

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