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Aftermarket Parts / Fuel & Air / Air Filters

K&N Universal Round Straight Air Filters

Regular: $31.99 - $142.99 Save up to 15%!

Sale: $27.95 - $121.95

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Flange ID Inches / MM

1 1/2" / 38mm

1 1/4" / 32mm

1 11/16" / 43mm

1 15/16" / 50mm

1 3/4" / 44mm

1 3/8" / 35mm

1 7/8" / 48mm

1" / 25mm

1.875" / 48mm

2 1/16" / 52mm

2 1/2" / 63.5mm

2 1/2" / 63mm

2 1/2" / 63mm / 2.5" / 64mm

2 1/4" / 57mm

2 1/8" / 54mm

2 11/16" / 68mm

2 3/4" / 70mm

2 7/16" / 62mm

2.062" / 52mm

3" / 76mm

3.375" / 86mm

Dimensions - Length

3 1/2" - 4"

3 1/2" - 5"

3 1/2" - 6"

3 3/4" - 4"

3 3/4" - 5"

3 3/4" - 6"

3" - 2 1/2"

3" - 3"

3" - 4"

3" - 5"

3" - 6"

3" x 4" x 1.75" - 4"

3.5" x 4" x 2" - 4"

4 1/2" - 4"

4 1/2" - 5"

4" - 6"

4" - 7"

4.875" x 12.25" - 12.25"

5 1/2" - 2 1/2"

5 1/2" - 5"

5" - 5"

Specifications and Options

Brand	K&N
Flange ID Inches / MM	-
Dimensions	-
Filter Style	-
Filter Type	-
Flange Position	-
Length	-

Note: This item is a universal/custom fit component, and is not a direct fitment for your machine. These parts may require modification and we recommend installation by a certified mechanic. Please have machine specifications ready when you call.

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How To Video - Dirt Bike K&N Air Filter Installation

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Product Details

K&N Universal Round Straight Air Filters

K&N Universal Round Straight Air Filters are designed and manufactured for a wide variety of applications. Regardless of the angle, offset diameter of the air intake, there is a K&N Universal air filter for your equipment. All filters are constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16" (1.5mm) to fit in-between sizes. K&N Universal air filters are available in round, tapered (cone style) and oval designs, for just about any special application.

Features

Clamps directly to the carburetor throat, replacing the stock airbox and filter element
Pleated design increases surface area air flow
Match the o.d. of your carb throat with the i.d. of the filter (given in inches and millimeters)
Cleanable & reusable
Rubber end cap
Sold each

Articles

How To: Clean and Maintain Motorcycle Air Filters
Air filters giving you a tough time? Check out this guide to help clean and maintain them!

Specifications and Options

Brand	K&N
Flange ID Inches / MM	1 1/2" / 38mm, 1 1/4" / 32mm, 1 11/16" / 43mm, 1 15/16" / 50mm, 1 3/4" / 44mm, 1 3/8" / 35mm, 1 7/8" / 48mm, 1" / 25mm, 1.875" / 48mm, 2 1/16" / 52mm, 2 1/2" / 63.5mm, 2 1/2" / 63mm, 2 1/4" / 57mm, 2 1/8" / 54mm, 2 11/16" / 68mm, 2 3/4" / 70mm, 2 7/16" / 62mm, 2.062" / 52mm, 2.5" / 64mm, 3" / 76mm, 3.375" / 86mm
Dimensions	3 1/2", 3 3/4", 3", 3" x 4" x 1.75", 3.5" x 4" x 2", 3.5" x 5" x .625", 4 1/2", 4", 4.875" x 12.25", 5 1/2", 5"
Filter Style	Round Straight
Filter Type	Air Filters
Flange Position	10 degrees, 20 degrees, Angled 10°, Angled 17°, Angled 20°, Angled 20° / 2" Lg, Angled 40°, Angled 5°, Centered, Offset
Length	12.25", 2 1/2", 3", 4", 5", 6", 7"

Q & A

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Why did you choose this?

BikeBandit Store

Replacing the airbox on my XT250!

John H on Apr 19, 2021

K&N Reputation

Michael B on Jul 22, 2018

Replacing the airbox on my XT250!

John H on Apr 19, 2021

Brand name is the BEST

Brian D. T on Feb 21, 2019

K&N Reputation

Michael B on Jul 22, 2018

Brand name is the BEST

Brian D. T on Feb 21, 2019

I want to replace my single Filter for 6 K and N filters on my 97 Honda Valkyrie, what type do you suggest?

douglas f on Aug 12, 2019

BEST ANSWER: Douglas, thank you for the question. I would recommend for you to use a pod filter. In order to identify what size you will need, disassemble the stock air box and measure diameter of the inlet/connecting tube from the carburetor to the air box. After you have this measurement, try to get a rough measurement of how much clearance you have from where the filter will hit or touch the frame/any other component. It is to my understanding that it is a pretty snug fit so you might be sacrificing some air cleaning capability. A large air box and the square filter (OEM) would be something I would stick to versus the individual filters but if you really want to convert it those are the steps I would take to identify what filters you will need. Please let us know if there is anything else we can do for you by contacting us by email at [email protected], Live Chat or by phone toll-free at 1-888-339-3888. We are always more than happy to help.