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K&N BU-9003 Replacement 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 BU-9003 Replacement Air Filter fits some Buell Firebolt XB12R, Buell Firebolt XB9R, Buell Lightning CityX XB9SX, Buell Lightning Long XB12SS, Buell Lightning XB12S, Buell Lightning XB12SCG, Buell Lightning XB12STT, Buell Lightning XB9S, Buell Lightning XB9SX, Buell Ulysses Police XB12XP, Buell Ulysses XB12X, and Buell Ulysses XB12XT 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 ShapeRound
Filter MaterialCotton Gauze
Filter Re-Oiling Amount1.07 oz (32 ml)
Height3.875 in (98 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height3.94 in (100 mm)
Product Box Length10.25 in (260 mm)
Product Box Width10.25 in (260 mm)
Product StyleUnique Air Filters
Weight1.3 lb (0.6 kg)

K&N BU-9003 Replacement Air Filter Product Reviews

Thursday, April 6, 2017 - Part BU-9003
Thank you, for not stopping the production of filters for older motorcycles and cars.

J Stout
Fulton, California
Tuesday, September 1, 2015 - Part BU-9003
Instantly noticed improvement when combined with open air box kit.

Josh Wolf
Madison, Wisconsin
Wednesday, July 15, 2015 - Part BU-9003
Noticeable difference in throttle response with bone stock configuration. When I switched exhaust to aftermarket, I felt like noise increased and power decreased. But I think my ecm needs remapping, nothing to do with the great k&n filter.

Anderson, South Carolina
Thursday, August 21, 2014 - Part BU-9003
Excellent product and response from the motorcycle. I run K&N on all my vehicles.

Freddie Greer
Orange, Texas
Tuesday, November 12, 2013 - Part BU-9003
Very good quality product as I expected from K&N.

Korey Kneller
Chicago, Illinois
Saturday, October 26, 2013 - Part BU-9003
Awesome product.  My Buell is a different bike!

Mike Nofi
Rohnert Park, California