$48.99 USD
MSRP $65.59 25.3% Off
Free Ground Shipping!
In Stock & Ready to Ship!
Find a Dealer

K&N HA-2511 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   6 Customer Reviews
  • Designed to provide increased horsepower and torque
  • Pleated media provides a large filtration area offering long service intervals
  • Multiple layers of woven cotton gauze media offers excellent filtration
  • Application specific base seal and sealing bead
  • Made in the USA for over 40 years
  • Washable & reusable, pre-oiled and ready to ride!
  • Million-Mile Limited Warranty
The K&N HA-2511 Air Filter fits some Honda CB300F, Honda CB300F ABS, Honda CBR250R, Honda CBR250R ABS, Honda CBR300R, and Honda CBR300R ABS models. See vehicle applications link for details.
K&N's high-flow air filters are available as a replacement for your stock motorcycle air filter element. They are custom engineered to fit your specific application and are designed to provide low restriction and increased performance, while providing excellent engine protection for your motorcycle.

[More Information on K&N Replacement Air Filters]

Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Height0.938 in (24 mm)
Outside Length6.438 in (164 mm)
Outside Width4.438 in (113 mm)
Package Contents1 Air Filter
Package Quantity1
Product StylePanel Air Filter
Weight0.6 lb (0.3 kg)
Filter Re-Oiling Amount0.38 oz (11 ml)
Product Box Height9.69 in (246 mm)
Product Box Length7.72 in (196 mm)
Product Box Width1.75 in (44 mm)

K&N HA-2511 Air Filter Product Reviews

Tuesday, September 5, 2017 - Part HA-2511
First, great service delivering to Korea within 3 working days. Second & more importantly, coupled with my Yoshimura exhaust, this K&N filter makes the bike noticeably sound better & generally feels livelier on the acceleration higher up the rev range.

Thomas Greenhough
Jinju-si, Korea, South
Tuesday, August 30, 2016 - Part HA-2511
This filter made my bike even more fun to ride. I instantly felt the torque and horsepower go up, and I will definitely recommend this to everyone.

Jesse Kropidlowski
Green Bay, Wisconsin
Monday, July 4, 2016 - Part HA-2511
Great customer service. The filter didn't come with the frame but they were quick to remedy that. I will continue buying their products. This filter will help you gain a bit of power with your cb300f/cbr300r, especially when paired with exhaust and tuner...definitely better than oem.

Sam D.
Toney, Alabama
Wednesday, January 6, 2016 - Part HA-2511
Filter arrived in very timely manner, installation was easy (as illistrated) Pleased with the results. Thank You K&N

Jeff Wingrove
Charlotte, Nevada
Wednesday, November 5, 2014 - Part HA-2511
This filter works great! Switched out my paper filter for this one in my 2015 CBR300R. Same filter size as the CBR250R which is the bike this is meant for. K&N is great!

Monday, August 12, 2013 - Part HA-2511
I recently fitted a K&N HA-2511 filter on my Honda CBR 250R. It took less than 5 minutes to change the filter from the stock filter to the K&N HA 2511. I am extremely happy with the performance of my bike from the very moment I fitted it! There was a definite change in the sound of the bike (much more refined and peppy) and the torque went up instantly. The bike seems to breathe better and run better too, with better pick up, more response and seems to have improved my fuel economy marginally too. All in all a great boost to my bike and to my riding satisfaction.

Suraj H
Bangalore, India