K&N parts matching Fram CA3901 air filter

The Fram CA3901 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Fram air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Lance Rizzuto, Williamsburg, Virginia
I have had many K&N filters. This one was for a jeep that for the first time towed a motorcycle trailer from NJ to Williamsburg Va. The Jeep ran hot towing so one of the few things I could do while do on Vacation was to get a K&N filter to help for the trip home. K&N got it to my resort the next day. It added enough power that I ran about 20° cooler. K&N, Good Stuff. Worth the price just on that one trip.
33-2018 K&N 33-2018 Replacement Air Filter
List Price: $97.99
Your Price: $62.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Allen, Palm Bay Florida
My 1999 Dodge Ram 1500 4x4 has the 5.9 litre V8 and I average 15.5 mpg. I have a factory cold air intake so I bought the K&N drop in air filter for it. After installing it I went on a short drive around town. I drove around 70 miles and my gas gauge needle never moved,showing me I for sure made a good investment by getting my K&N filter. My truck has 136,000 miles on it There are no oil leaks, it doesn't use oil and it is still a beast with 350 foot pounds of stump pulling power.
George Rey Levi Zuni, Albuquerque, New Mexico
No picture of anything fancy, just an older 3/4 ton Dodge Ram that works its rear off in dusty conditions. A perfect fit, it even looks cool.
Bryan Batsch, Gackle North Dakota
This filter installed very easy on my 2001 dodge 1500 quad cab truck with a 360 magnum. I noticed the power difference right away and my gas mileage also improved. Would highly recommend this upgrade to anyone.
33-2084 K&N 33-2084 Replacement Air Filter
List Price: $91.89
Your Price: $58.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Christopher Jorda, New Jersey
Ordered twice from K&N once for my 98 Eclipse (short air intake system) and my 2002 ZX6R. Both products made me love K&N. This time I bought an air filter for my 2001 Jeep Cherokee and its great and easy to install. I always recommend K&N to my friends.
Kendra, Ohio
Love these filters. First thing I do when I get a new atv, car or truck is get a K&N air filter. Increased horse power and all around runs better.
Matt Lee, Reynoldsburg, Ohio
Love K&N filters. Have always bought them for my cars.
33-2122 K&N 33-2122 Replacement Air Filter
List Price: $102.39
Your Price: $65.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Richard E. Curry, Miami, Florida
Ever since i put the air filter in my car it runs better and the pick up is great.
Ernie Vaio, Sooke, Canada
I have used K&N products for over 14 years and they are GREAT. I will always use you filters etc. with every vehicle I own.
Daniel Rutland, Grapeview, Washington
Seems to make my truck run better. I have only had the filter a short time.
33-2175 K&N 33-2175 Replacement Air Filter
List Price: $90.39
Your Price: $57.99