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  • K&N Filter Universal Rubber Round Air Filter 20 Deg Flange Angle 2.25in Flange ID x 3.5in OD x 6in H
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K&N Filter Universal Rubber Round Air Filter 20 Deg Flange Angle 2.25in Flange ID x 3.5in OD x 6in H

K&N Engineering
KNNRU-1720
In stock
Air Filters - Universal Fit
$57.99
K&N Universal Rubber Air Filter - 2.25" ID x 3.5" OD x 6" H (RU-1720) Shop the K&N Universal Round Rubber Air Filter (RU-1720). Features...
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$57.99
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K&N Filter Universal Rubber Round Air Filter 20 Deg Flange Angle 2.25in Flange ID x 3.5in OD x 6in H
Description

K&N Universal Rubber Air Filter - 2.25" ID x 3.5" OD x 6" H (RU-1720)

Shop the K&N Universal Round Rubber Air Filter (RU-1720). Features a 20-degree flange angle, 2.25-inch ID, and washable, reusable high-flow design.

The K&N Universal Rubber Round Air Filter (Part # RU-1720) delivers exceptional airflow and engine protection for custom intake setups. Constructed with oiled cotton gauze filtration media encased in a flexible frame, this filter reduces air restriction to boost overall horsepower and engine efficiency.

It features an integrated 20-degree angled flange designed specifically for tight engine bays or custom clearance angles. The ultra-strong, molded pliable rubber flange effectively absorbs vibration while providing a secure fit that can stretch up to 1/16th of an inch (1.5mm) to accommodate slight variations in tube sizes. Fully washable and reusable, this clamp-on air filter offers long-term durability and simplified maintenance.

Best Uses

  1. Custom Engine & Intake Builds: Ideal for vehicles or equipment requiring a 20-degree angle to clear clearance obstacles inside tight engine bays.
  2. Motorsports & Racing Vehicles: Suitable for high-performance track and off-road applications demanding increased air volume.
  3. Small Industrial & Utility Equipment: Fits generators, tractors, and snowmobiles using a matching 2.25-inch intake tube.

Features

  1. 20-Degree Angled Flange: Specifically angled to allow clean routing and clear obstructions in compact compartments.
  2. Pliable Rubber Flange: Ultra-strong molded construction absorbs engine vibration and allows up to 1/16" (1.5mm) stretch for easy fitting.
  3. Cotton Gauze Filtration Media: High-flow layered cotton media provides high air velocity while capturing harmful debris.
  4. Pre-Oiled and Ready to Install: Ships pre-oiled from the factory for immediate clamp-on installation.
  5. Exact Dimensions: Engineered with a 2.25-inch Flange ID, 3.5-inch Outside Diameter, and 6-inch Height.

Benefits

  1. Increases Horsepower & Acceleration: High-flow media reduces intake restriction, allowing your engine to draw in more air efficiently.
  2. Washable & Reusable: Designed to be cleaned and re-oiled multiple times, saving money on replacement paper filters over time.
  3. Vibration Absorption: The flexible rubber flange dampens heavy engine vibrations to maintain a tight clamp-on seal.
  4. Flexible Fitment: Pliable flange design allows slight stretching to fit snug on intake pipes that slightly vary from the nominal size.
  5. Eco-Friendly Choice: Reusable design keeps disposable paper filters out of landfills for long-term sustainability.
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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.

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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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