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  • K&N Universal Rubber Filter 3 1/2inch ID FLG / 6inch Base / 4-5/8inch Top / 9inch Height
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K&N Universal Rubber Filter 3 1/2inch ID FLG / 6inch Base / 4-5/8inch Top / 9inch Height

K&N Engineering
KNNRE-0920
In stock
Air Filters - Universal Fit
$68.99
K&N Universal Rubber Air Filter | 3.5" ID, 6" Base, 9" Height Boost engine power with the K&N Universal Rubber Air Filter. Featuring a 3.5-inch...
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$68.99
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K&N Universal Rubber Filter 3 1/2inch ID FLG / 6inch Base / 4-5/8inch Top / 9inch Height
Description

K&N Universal Rubber Air Filter | 3.5" ID, 6" Base, 9" Height

Boost engine power with the K&N Universal Rubber Air Filter. Featuring a 3.5-inch inlet, 6-inch base, and washable design for high airflow.

The K&N Universal Rubber Clamp-On Air Filter is engineered to deliver high airflow while maintaining premium engine protection. Built with multiple layers of oiled cotton gauze, this filter traps dust, dirt, and microscopic debris without restricting vital intake air.

This filter features a 3.5-inch inner flange diameter, a 6-inch base diameter, a 4.625-inch top diameter, and a 9-inch overall height. Its durable molded rubber flange absorbs engine vibrations and stretches slightly to allow a snug fit onto existing intake piping. Because it is washable and reusable, it offers a long-lasting, cost-effective alternative to single-use paper filters.

Best Uses

  1. Custom Cold Air Intakes: Great for custom-built automotive intake setups that require a 3.5-inch inlet pipe.
  2. Motorsports & Racing: Ideal for track, off-road, or drag racing setups where maximum engine airflow and throttle response are required.
  3. Engine Swaps & Conversions: Fits custom builds with non-standard engine bays that need a round tapered clamp-on filter.
  4. Industrial & Specialty Equipment: Suitable for high-demand generators, custom machinery, or utility vehicles using a compatible 3.5-inch intake flange.

Features

  1. High-Flow Oiled Cotton Media: Multi-layered pleated cotton gauze treated with tacking agents to maximize airflow while catching debris.
  2. Pliable Molded Rubber Flange: Strong, flexible rubber flange absorbs engine vibration and stretches up to 1/16 inch (1.5mm) for a secure clamp-on fit.
  3. Round Tapered Shape: Features a 6-inch base tapering to a 4-5/8 inch top over a 9-inch height to fit tight engine bays.
  4. Washable & Reusable: Can be cleaned and re-oiled repeatedly using a standard K&N filter care kit.
  5. Clamp-On Design: Includes a heavy-duty clamp for quick, simple mounting directly onto intake tubes.

Benefits

  1. Increased Horsepower & Acceleration: Reduces air restriction to help your engine draw in more oxygen for noticeable performance gains.
  2. Superior Engine Protection: Traps harmful contaminants to prevent premature engine wear.
  3. Long-Term Cost Savings: Eliminates the need to buy disposable paper filters over the lifespan of your vehicle.
  4. Eco-Friendly Choice: Helps reduce landfill waste generated by discarded single-use filters.
  5. Vibration-Resistant Fit: Flexible rubber base prevents the filter from loosening or cracking under heavy engine vibrations.
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Shipping:

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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