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K&N SU-1806 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.9 out of 5 stars   9 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 SU-1806 Air Filter fits some Suzuki Boulevard M109R, Suzuki Boulevard M109R BOSS, Suzuki Boulevard M109R Ltd. Ed., Suzuki Boulevard M109R2, Suzuki Boulevard M109RZ Limited, Suzuki VLR1800 C1800R Intruder, Suzuki VLR1800 C1800RT Intruder, and Suzuki VZR1800 Intruder 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 ShapeUnique
Filter MaterialCotton Gauze
Height2 in (51 mm)
Package Contents2 Air Filters
Package Quantity2
Product StyleUnique Air Filters
Weight2 lb (0.9 kg)
Product Box Height10.31 in (262 mm)
Product Box Length10.19 in (259 mm)
Product Box Width3.94 in (100 mm)
This Product Includes2 Filters

K&N SU-1806 Air Filter Product Reviews

Tuesday, November 14, 2017 - Part SU-1806
The filters came a day earlier than expected. The fitment was exact fitment for my bike. The filters do allow my bike to accelerate smoother. I have only ridden about 40 miles since the installation so I will have to wait to see how it will help on fuel economy. Will update later.

Roderick Mathis
Columbia, South Carolina
Tuesday, December 27, 2016 - Part SU-1806
I've been a K&N fan for some time now. The filters are as high quality as there is for the money. The company is easy to deal with and the customer service has always been top notch. My most recent purchase was for my M109R. As soon as I installed these filters, I noticed an increase in my bikes performance and mileage. I'm likely to be a K&N user for life.

Randy Bisnett
Elk Grove, California
Monday, October 10, 2016 - Part SU-1806
Fast shipping, best price online. Product was as described.

Scott Barkley
Clatskanie, Washington
Wednesday, June 1, 2016 - Part SU-1806
Great fit and just what I needed.

Terry Beeler
Louisville, Kentucky
Monday, March 28, 2016 - Part SU-1806
Fast shipping and a good price.

Philadelphia, Pennsylvania
Monday, August 3, 2015 - Part SU-1806
Great product.

Matthew L Hubbard Jr.
Halifax, Virginia
Friday, September 5, 2014 - Part SU-1806
I ordered these filters to replace my stock ones on a 2006 Suzuki M109R. They are an exact fit, easy install, very happy with them.

Al Lewis
Park City, Kansas