How do I clean this filter?

K&N recommends their synthetic air filter cleaner. Apply the cleaner, rinse with water, and let the filter air dry before reinstalling. Since it's a Dryflow filter, there's no need to oil it.

What size clamp do I need to install this filter?

This filter has a 4-inch inside diameter flange. You'll need a clamp that matches that size to secure it to your intake pipe. Most parts stores sell those clamps individually.

Is this filter legal in California?

No, this filter is not CARB-approved and cannot be used on emissions-controlled vehicles in California. Check your local regulations before installing any aftermarket part.

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Trusted Since 1957

Est. 1957

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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Specifications

Brand: K&N
Part #: RU-5171HBK
UPC: 024844334350

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

Name: K&N Universal Rubber Filter-Round Tapered 4in Flange ID x 8in Base OD x 6.625in Top OD x 8in H
Brand: K&N
Price: 94.99 USD
Availability: InStock

$94.99

Only 4 left in stock

Universal clamp-on air filter with washable Dryflow media. For custom air intake setups.

Key Features

Washable filter — can be cleaned and reused
Dryflow synthetic media — no oil needed
Universal fit — clamps onto most intake pipes

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Fits these vehicles

Dodge Ram 2500 2003-2009
Dodge Ram 3500 2003-2009

Product Details

K&N Black Universal Air Filters are made from Dryflow oil-free synthetic media. These low restriction clamp-on air filters are designed and manufactured for a wide variety of applications. When dirty they can be easily washed using K&N synthetic air filter cleaner.