$68.99 USD
MSRP $93.09 25.9% Off
Free Ground Shipping!
In Stock & Ready to Ship!
Find a Dealer

K&N HD-1388 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   4 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
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 ShapeRectangular
Filter MaterialCotton Gauze
Filter Re-Oiling Amount0.5 oz (15 ml)
Height1.75 in (44 mm)
Inner WireNo
Outside Length8.438 in (214 mm)
Outside Width5.25 in (133 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height9.25 in (235 mm)
Product Box Length5.63 in (143 mm)
Product Box Width4.63 in (117 mm)
Product StyleRectangular Air Filter
Top Material/FinishZinc
Top StyleMetal
Weight1.1 lb (0.5 kg)

K&N HD-1388 Air Filter Product Reviews

Monday, October 17, 2016 - Part HD-1388
Was delivered quickly, is a perfect fit for my Sportster, and seems to give me quicker acceleration.

Gary Hoffman
Stuart, Florida
Tuesday, August 30, 2016 - Part HD-1388
Great service. Air cleaner fits as original.

John Waterman
Cocoa, Florida
Wednesday, June 29, 2016 - Part HD-1388
K&N shipped this air filter to me very quickly. Once installed, I definitely can tell the difference between the K&N air filter and the stock H-D air filter. A definite improvement over the stock air filter and I feel like I have gained a few horsepower. Totally recommended.

Jon Whitley
Barre, Vermont
Saturday, October 26, 2013 - Part HD-1388
Quick Shipment. Fits great.  Bike runs real well on it (HD-1388). Complete satisfaction. Thank You K&N

Ben Lomond, California