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K&N HD-0300 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   5 Customer Reviews
  • Designed to provide increased horsepower and acceleration
  • Specifically developed for Off-Road, Motocross, ATVs, UTVs and Side by Sides
  • Pleated cotton media provides a large filtration area offering low restriction, high-capacity and long service intervals
  • Multiple layers of woven cotton gauze media offers excellent filtration
  • Fits directly into OEM air box with application specific sealing bead ensuring a precise fit
  • No fuel management modifications are required to obtain increased performance
  • Washable & reusable, most are pre-oiled and ready to ride!
  • One Year Limited Warranty
The K&N HD-0300 Air Filter fits some Harley Davidson Baja 100, and Harley Davidson SR100 models. See vehicle applications link for details.
K&N off-road replacement air filters are ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude. Generally, no jet changes are required with just a K&N filter element. K&N replacement air filters are washable and reusable and provide high air-flow with excellent filtration.

[More Information on Off-Road Motorcycle and ATV Air Filters]

Available Information

Product Specifications

Filter MaterialCotton Gauze
Height2 in (51 mm)
Inner WireNo
Inside Diameter4 in (102 mm)
Outside Diameter5.25 in (133 mm)
Top StyleOpen
Top MaterialNone
Air Filter ShapeRound
Package Contents1 Air Filter
Package Quantity1
Product StyleRound Air Filter
Weight0.6 lb (0.3 kg)
Filter Re-Oiling Amount0.34 oz (10 ml)
Product Box Height3.5 in (89 mm)
Product Box Length6.31 in (160 mm)
Product Box Width6.56 in (167 mm)

K&N HD-0300 Air Filter Product Reviews

Tuesday, January 10, 2017 - Part HD-0300
Pretty tough to rate a filter I just purchased. The proof of the filter will be many miles down the road, but it's a K&N filter, so I'm really expecting quality service for the life of my vehicle. Shipping was quick.

Tim Lemburg
Dannebrog, Nebraska
Wednesday, September 14, 2016 - Part HD-0300
The fit and proformance of this filter is exactly what I was looking for. We have purchased these filters for other vehicles and will continue to do so.

Susan Schultz
Alamogordo, New Mexico
Thursday, April 14, 2016 - Part HD-0300
Fits perfectly in a 1966 Citroen 2CV (Type A53, 425cc engine)

San Jose, California
Tuesday, May 20, 2014 - Part HD-0300
Put the filter on a Buzzsaw/Log splitter powered by a 40 horse VW engine. So far it is working great. Love the product..

Ken Preuss
Burt, Michigan
Monday, August 13, 2012 - Part HD-0300
I asked KN for information and what did I get ???  A real answer, a technically based answer, not a quick guess... I got science, I love it.  Here is the message I got back.

Thank you for your interest in KN products. This air filter, HD-0300, will flow more than enough air for your application. Your motor, spinning at 6200 RPM, at 100 volumetric efficiency is capable of pulling 145 CFM. This filter will flow 197 CFM before 1.5 in/h20 restriction.

Frankly I expected quality from KN and was impressed with a data based answer.

Mike M.
Ottawa Canada