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  • K&N Filter Universal Rubber Filter 3 1/2 inch Flange 4 5/8 inch Base 3 1/2 inch Top 4 1/2 inch Heigh
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K&N Filter Universal Rubber Filter 3 1/2 inch Flange 4 5/8 inch Base 3 1/2 inch Top 4 1/2 inch Heigh

K&N Engineering
KNNRU-2790
In stock
Air Filters - Universal Fit
$52.99
K&N Universal Rubber Air Filter | 3.5" Flange, 4.5" Height Shop the K&N Universal Rubber Air Filter with a 3.5" flange, 4.5" height, and 4.625"...
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$52.99
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K&N Filter Universal Rubber Filter 3 1/2 inch Flange 4 5/8 inch Base 3 1/2 inch Top 4 1/2 inch Heigh
Description

K&N Universal Rubber Air Filter | 3.5" Flange, 4.5" Height

Shop the K&N Universal Rubber Air Filter with a 3.5" flange, 4.5" height, and 4.625" base. Designed to boost airflow, horsepower, and acceleration. Washable & reusable.

The is engineered to deliver high airflow while maintaining superior filtration to protect your engine. Built with molded pliable rubber flanges, this filter absorbs heavy engine vibrations and provides a tight, leak-free clamp-on connection. Its flexible rubber flange can stretch up to 1/16 of an inch (1.5mm) to accommodate slightly off-size custom intake pipes.

This filter utilizes treated multi-layer cotton gauze media designed to trap harmful dirt and debris without restricting air intake. Built for high durability and longevity, it comes pre-oiled from the factory and is fully washable and reusable, serving as an eco-friendly performance upgrade over standard disposable paper filters.

Best Uses

  1. Custom Intake Systems: Ideal for custom engine builds, hot rods, or aftermarket air intake kits requiring a 3.5-inch inlet flange.
  2. Motorsports & Racing: Used on race cars, track builds, and off-road vehicles that require maximum airflow and engine protection.
  3. Small Engine & Power Equipment: Works well on custom generators, tractors, snowmobiles, or radio-controlled vehicles.

Features

  1. Pliable Rubber Flange: Absorbs engine vibrations and stretches up to 1/16 inch for a precise, secure seal.
  2. High-Flow Cotton Media: Premium layered cotton gauze treated with tacking agents to capture dust and debris.
  3. Washable & Reusable Design: Fully cleanable with K&N filter cleaner kits, eliminating the need for frequent replacement filters.
  4. Clamp-On Installation: Secures quickly using a single clamp for simple installation on custom tube intakes.
  5. Pre-Oiled Ready to Install: Factory pre-oiled so you can install and use it right out of the box.

Benefits

  1. Increases Engine Output: Reduces intake restriction to help boost overall horsepower and acceleration.
  2. Superior Engine Protection: Multiple layers of cotton trap microscopic particles to shield engine components.
  3. Cost-Effective Long-Term Choice: Reusable design saves money over time compared to continuously buying disposable paper air filters.
  4. Flexible Fitment: Pliable rubber neck accommodates slight mounting variations and absorbs engine motion.
  5. Eco-Friendly: Reduces landfill waste produced by single-use OEM style air filters.
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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.

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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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