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: $100.99
Your Price: $64.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
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.
Chip Lawson, Dallas, Texas
This is the second vehicle I have owned where I have purchased and installed a K&N washable filter. As before, the filter was easy to install and fit perfectly. While I have no way of knowing for sure or proving it, I think/feel the engine runs smoother and has more pick-up. I like the fact that I can wash and re-charge the filter (saves on landfill and I think is environmentally friendlier than disposable filters) and can do it whenever I want without the expense of a new filter. If the truck was new I would have invested in a K&N Cold Air Intake system. They are outrageously good!!!
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: $94.99
Your Price: $60.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Daniel Saad , Royal Oak, Michigan
This is the third vehicle in which I've installed a K&N filter - always a great investment.
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.
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.
33-2122 K&N 33-2122 Replacement Air Filter
List Price: $104.99
Your Price: $67.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Terry Mulawa, Michigan
I have K&N air filters on all four of my vehicles and they all function well.
Daniel Rutland, Grapeview, Washington
Seems to make my truck run better. I have only had the filter a short time.
Jim Hasch, New Haven, Indiana
I have been using your products ever since they appeared on my local market scene. I love them. Period! 'Nuff said! Haha!
33-2175 K&N 33-2175 Replacement Air Filter
List Price: $92.99
Your Price: $59.99