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  • K&N Universal Rubber Filter 2.5in Flange ID x 3.5in OD x 6in Height
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K&N Universal Rubber Filter 2.5in Flange ID x 3.5in OD x 6in Height

K&N Engineering
KNNRD-0720
In stock
Air Filters - Universal Fit
$41.99
K&N Universal Rubber Air Filter | 2.5" Flange, 3.5" OD, 6" Height (RD-0720) Boost airflow and protect your engine with the K&N Universal Rubber Air...
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$41.99
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K&N Universal Rubber Filter 2.5in Flange ID x 3.5in OD x 6in Height
Description

K&N Universal Rubber Air Filter | 2.5" Flange, 3.5" OD, 6" Height (RD-0720)

Boost airflow and protect your engine with the K&N Universal Rubber Air Filter. Features a 2.5" pliable flange, 3.5" outer diameter, and washable oiled-cotton design for reusable performance.

The K&N Universal Rubber Air Filter is engineered to maximize airflow while delivering outstanding engine protection across custom and specialty applications. Built with multi-layered, oiled cotton gauze media, this high-flow filter allows your engine to draw in a larger volume of air, helping increase horsepower and acceleration compared to restrictive paper filters.

Its flexible, ultra-strong molded rubber flange is built to absorb engine vibrations and resist cracking under heat. The flange can stretch up to 1/16 of an inch (1.5mm), making installation easy over slightly offset or non-standard inlet pipes. Because it is fully washable and reusable, this clamp-on filter replaces disposable units for long-term reliability and performance.

Best Uses

  1. Custom Intake Systems: Ideal for custom automotive cold-air or short-ram intake setups requiring a 2.5-inch inlet diameter.
  2. Motorsports & Racing: Provides high-volume airflow under demanding race conditions.
  3. Off-Road & Specialty Vehicles: Great for ATVs, UTVs, snowmobiles, and custom buggies with tight engine bays.
  4. Small Engines & Equipment: Excellent performance upgrade for generators, tractors, and custom small-engine builds.

Features

  1. Pliable Molded Rubber Flange: Absorbs engine vibration for a secure seal and stretches up to 1/16" (1.5mm) to accommodate minor size differences.
  2. High-Flow Oiled Cotton Media: Layered cotton gauze captures contaminants without restricting incoming airflow.
  3. Clamp-On Design: Easy installation that fastens directly onto intake tubing with a standard hose clamp.
  4. Washable & Reusable: Designed to be cleaned and re-oiled multiple times using a K&N Recharger kit, eliminating filter waste.
  5. Precise Dimensions: Built to fit tight clearance areas with a 2.5-inch inner flange diameter, 3.5-inch base outer diameter, and 6-inch total height.

Benefits

  1. Improved Performance: Enhances throttle response and assists in increasing horsepower and torque.
  2. Long-Term Cost Savings: Eliminates the need to buy disposable paper filters over the lifespan of your vehicle.
  3. Durable Engine Protection: Retains dirt and debris effectively to guard engine internals against premature wear.
  4. Flexible Fitment: The flexible rubber base fits snugly on various intake pipe materials, including metal, composite, or plastic.
  5. Eco-Friendly Choice: Reduces landfill waste by reusing the same filter for years.
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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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