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K&N Universal 4 Inch Filter

K&N Engineering
KNNRU-2510
In stock
Air Filters - Universal Fit
$52.99
K&N Universal 4-Inch Clamp-On Air Filter | High-Flow & Washable Boost horsepower and airflow with the K&N Universal 4-inch clamp-on air filter. Engineered with oiled...
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$52.99
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K&N Universal 4 Inch Filter
Description

K&N Universal 4-Inch Clamp-On Air Filter | High-Flow & Washable

Boost horsepower and airflow with the K&N Universal 4-inch clamp-on air filter. Engineered with oiled cotton media, reusable construction, and a durable flexible rubber flange.

The K&N Universal 4-Inch Clamp-On Air Filter is engineered to unlock hidden horsepower and acceleration by delivering significantly higher airflow than traditional disposable paper filters. Constructed with multiple layers of premium woven cotton gauze soaked in a proprietary tacking oil, this filter creates an intricate matrix that traps microscopic debris while allowing maximum air into the intake tract.

Featuring a pliable molded rubber flange designed to fit standard 4-inch outer-diameter intake tubes, the housing easily stretches up to 1/16" (1.5mm) to absorb engine vibration and ensure a tight, leak-free seal. Fully washable and reusable, this high-performance filter eliminates the constant cycle of buying replacement filters—simply clean and re-oil every 75,000 miles under normal highway driving conditions.

Best Uses

  1. Custom Cold Air Intakes: Ideal for custom-fabricated or aftermarket performance intake tubing requiring a 4-inch inlet flange.
  2. Forced Induction Systems: Perfect directly mounted to turbocharger inlets or supercharger intake pipes.
  3. Track & Drag Racing: Maximizes volumetric efficiency for motorsport builds demanding unrestricted airflow.
  4. Engine Swaps & Hot Rods: Versatile, space-efficient solution for custom engine conversions where standard air boxes won't fit.

Features

  1. 4-Inch Flexible Flange: Molded rubber collar absorbs engine vibration and stretches up to 1/16 inch for precise fitment.
  2. Layered Cotton Gauze Media: High-flow design featuring layered oiled cotton engineered to optimize airflow and filtration efficiency.
  3. Clamp-On Design: Heavy-duty construction that attaches directly onto intake tubing with a standard worm-gear hose clamp.
  4. Washable & Reusable: Designed to be cleaned and re-oiled repeatedly using a K&N Recharger kit.
  5. Universal Compatibility: Adapts across various custom automotive, power sports, and stationary engine setups.

Benefits

  1. Increased Horsepower & Acceleration: Reduces air intake restriction to deliver noticeable throttle response gains.
  2. Long-Term Cost Savings: Replaces disposable filters over the lifetime of your vehicle.
  3. Low Maintenance Schedule: Requires cleaning only once every 75,000 miles under normal driving conditions.
  4. Superior Engine Protection: Multi-layer design captures airborne contaminants to protect internal engine components.
  5. Eco-Friendly Choice: Reusable construction prevents disposable paper filters and packaging waste from ending up in landfills.

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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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