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  • K&N Universal Rubber Filter-Round Tapered 4in Flange ID x 8in Base OD x 6.625in Top OD x 8in H
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K&N Universal Rubber Filter-Round Tapered 4in Flange ID x 8in Base OD x 6.625in Top OD x 8in H

K&N Engineering
KNNRU-5171HBK
Auf Lager
Air Filters - Universal Fit
$94.99
K&N Universal Rubber Filter – Round Tapered 4in Flange Upgrade airflow with the K&N Universal Round Tapered Air Filter (4 in Flange ID, 8 in...
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$94.99
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K&N Universal Rubber Filter-Round Tapered 4in Flange ID x 8in Base OD x 6.625in Top OD x 8in H
Description

K&N Universal Rubber Filter – Round Tapered 4in Flange

Upgrade airflow with the K&N Universal Round Tapered Air Filter (4 in Flange ID, 8 in Base, 8 in Height). Washable, reusable performance air filter.

Engineered to increase horsepower, torque, and overall engine responsiveness, the K&N Universal Clamp-On Rubber Air Filter delivers industry-leading airflow without sacrificing filtration protection. Featuring a 4-inch flange inside diameter, 8-inch base outer diameter, 6.625-inch top outer diameter, and an 8-inch total height, this round tapered cone filter provides a massive surface area optimized for high-volume intake systems.

Constructed with multiple layers of oiled, woven cotton gauze sandwiched between coated aluminum wire mesh, this high-flow filter captures microscopic contaminants while minimizing air restriction. Its durable, flexible molded-rubber flange absorbs engine vibration and stretches slightly (up to 1/16") to secure onto custom intake tubes, throttle bodies, or turbo inlet pipes. Completely washable and reusable, this K&N filter is designed to last for the life of your engine.

Best Uses

  1. Custom Cold Air Intake Systems: Ideal for custom fabrications on cars, trucks, and performance street builds requiring a 4-inch intake tube connection.
  2. Turbocharged & Supercharged Engines: Perfect for high-CFM boosted applications that demand unrestricted airflow to maximize spool times and boost efficiency.
  3. Track & Motorsport Builds: Engineered for race cars, drift builds, and drag cars operating under high-rpm, high-airflow conditions.
  4. Off-Road & Diesel Performance: Fits custom diesel, truck, or off-road setups needing robust debris protection without choking the intake.

Features

  1. High-Flow Oiled Cotton Media: Multi-layered pleated cotton gauze treated with specialized filter oil to capture dirt while delivering maximum airflow.
  2. Pliable Molded-Rubber Flange: Features an ultra-durable 4-inch ID rubber flange designed to absorb heavy engine vibration and ensure a tight, secure seal.
  3. Round Tapered Cone Geometry: Large 8" base tapering to a 6.625" top provides expansive surface area for high-volume intake demand.
  4. Washable & Reusable: Designed to be cleaned and re-oiled using a K&N Recharger Kit, eliminating the need for disposable paper filters.
  5. Clamp-On Design: Includes a heavy-duty stainless steel worm-gear clamp for effortless, direct-fit installation on custom or existing intake piping.

Benefits

  1. Increased Horsepower & Acceleration: Reduces air intake restriction, letting your engine breathe freer for noticeable power gains.
  2. Long-Term Cost Savings: Buy it once—wash, re-oil, and reuse it for life instead of constantly buying replacement paper filters.
  3. Engine-Safe Protection: State-of-the-art filtration media traps harmful dust and particles, guarding internal engine components.
  4. Flexible & Universal Compatibility: Engineered to fit a wide range of custom application spaces with standard 4-inch piping connections.
  5. Eco-Friendly Choice: Significantly reduces landfill waste caused by single-use disposable air filters.



This Part Fits:

 

Year Make Model Submodel
2003,2005-2009 Dodge Ram 2500 Laramie
2003-2004,2006-2009 Dodge Ram 2500 SLT
2006-2007 Dodge Ram 2500 Sport
2003-2004,2006-2009 Dodge Ram 2500 ST
2008-2009 Dodge Ram 2500 SXT
2006-2007 Dodge Ram 2500 TRX4
2003-2009 Dodge Ram 3500 Laramie
2003-2009 Dodge Ram 3500 SLT
2006-2007 Dodge Ram 3500 Sport
2003-2009 Dodge Ram 3500 ST
2008-2009 Dodge Ram 3500 SXT
2007 Dodge Ram 3500 TRX4
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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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