K&N E-0644 Air Filter

Replacement Filters / Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5     28 Customer Reviews
$100.99 USD
In Stock & Ready to Ship!   Free Ground Shipping!
Find a Dealer

Product Overview

  • Designed to boost horsepower and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states
  • Will NOT void vehicle warranty
  • Million Mile Limited Warranty®
The K&N E-0644 Air Filter fits some Ford F250 Super Duty, Ford F350 Super Duty, Ford F450 Super Duty, and Ford F550 Super Duty models. See vehicle applications link for details.
K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

[More Information on K&N Replacement Air Filters]
Air Filter ShapeOval
Filter MaterialCotton Gauze
Height8.938 in (227 mm)
Inner WireNo
Outside Length9.25 in (235 mm)
Outside Width6.5 in (165 mm)
Top StyleRubber
Top MaterialNone
Flange Length0.281 in (7 mm)
Package Contents1 Air Filter
Package Quantity1
Warranty1,000,000 Miles/10 Year
Product StyleOval Air Filter
Weight4 lb (1.8 kg)
Filter Re-Oiling Amount8.3 oz (246 ml)
Product Box Height12.06 in (306 mm)
Product Box Length12 in (305 mm)
Product Box Width8 in (203 mm)
WARNING: Cancer and reproductive

K&N E-0644 Air Filter Product Reviews

Tuesday, April 2, 2019 - Part E-0644
Very happy

Amanda Zemken
Fort Johnson, New York
Thursday, February 28, 2019 - Part E-0644
I have put K&N filters in every vehicle I have owned for the past 20 plus years, and in my hot rods for years before that While there are many others in the market today, I have had such great success with the K&N filter that I cannot switch I have never seen an increase in performance or MPG as others state they have, I love the quality and filtering capacity of the filter. Less waste in a landfill makes it a win in every way. With 6 vehicles parked in the garage or the driveway, and a K&N in everyone; you bet I believe in the product.

Rio Rancho, New Mexico
Wednesday, February 27, 2019 - Part E-0644
Been using them in all my vehicles for over 15 years very pleased.

William Elliott
Katy, Texas