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  • K&N Universal Clamp-On Air Filter 4-1/2in FLG / 5-7/8in B / 4-1/2in T / 8-3/8in H
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K&N Universal Clamp-On Air Filter 4-1/2in FLG / 5-7/8in B / 4-1/2in T / 8-3/8in H

K&N Engineering
KNNRU-1008
In stock
Air Filters - Universal Fit
$78.99
K&N Universal Clamp-On Air Filter | 4.5" Flange, High-Flow Performance Boost engine power with the K&N Universal Clamp-On Air Filter (4-1/2" FLG, 5-7/8" Base, 4-1/2"...
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$78.99
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K&N Universal Clamp-On Air Filter 4-1/2in FLG / 5-7/8in B / 4-1/2in T / 8-3/8in H
Description

K&N Universal Clamp-On Air Filter | 4.5" Flange, High-Flow Performance

Boost engine power with the K&N Universal Clamp-On Air Filter (4-1/2" FLG, 5-7/8" Base, 4-1/2" Top, 8-3/8" H). Washable, reusable, and built for maximum airflow.

The K&N Universal Clamp-On Air Filter is engineered to deliver high airflow while providing exceptional engine protection. Designed for custom intakes, hot rods, race cars, and specialized power equipment, this performance filter features a 4-1/2 inch flange diameter, a 5-7/8 inch base diameter, a 4-1/2 inch top diameter, and a 8-3/8 inch overall height.

Crafted with multiple layers of oiled, pleated cotton gauze media, this air filter allows significantly more air into your engine compared to traditional paper filters. Increased airflow directly improves combustion efficiency, resulting in enhanced throttle response, increased horsepower, and improved torque. The unit features a flexible, molded rubber flange that absorbs engine vibration and securely mounts to custom intake pipes with the included clamp. Fully washable and reusable, this air filter is designed to last the lifetime of your vehicle, reducing maintenance costs and landfill waste.

Best Uses

  1. Custom Engine Builds & Hot Rods: Ideal for custom intake setups requiring a 4-1/2 inch inlet tube.
  2. Motorsports & Racing: Provides maximum air volume needed for high-RPM performance and track use.
  3. Off-Road & Specialized Equipment: Excellent upgrade for generators, tractors, and off-road vehicles needing durable filtration.
  4. Performance Air Intakes: Replaces restrictive factory or worn-out aftermarket cone filters on upgraded intake pipes.

Features

  1. High-Flow Cotton Gauze Media: Features multi-layered, oiled cotton media designed to maximize air inflow without compromising filtration quality.
  2. Washable & Reusable Design: Easily cleanable with a K&N Recharger kit, eliminating the need for frequent replacements.
  3. Pliable Rubber Flange: Strong, molded rubber construction absorbs engine vibration and allows up to 1/16" flex for a tight seal.
  4. Precision Dimensions: Designed with a 4-1/2" flange inside diameter, 5-7/8" base diameter, 4-1/2" top diameter, and 8-3/8" filter height.
  5. Clamp-On Mounting: Includes a heavy-duty hose clamp for easy, secure, direct-fit installation on custom air tubes.

Benefits

  1. Boosts Horsepower & Acceleration: High-volume airflow supplies engines with cleaner, denser air to optimize combustion.
  2. Improved Throttle Response: Reduces intake restriction, allowing your engine to react faster under acceleration.
  3. Cost-Effective Lifetime Savings: Reusable construction lasts for years, saving money over disposable paper filters.
  4. Environmentally Friendly: Reusable filters reduce automotive waste going to landfills.
  5. Reliable Engine Protection: Advanced filter media traps harmful dirt, dust, and contaminants before reaching internal engine components.  
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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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