K&N parts matching AC Delco A3621C air filter

The AC Delco A3621C air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many AC Delco air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Lynn Hadley, Orange County, California
I have been using K & N filters close to 40 years now, on my off road motorcycles to all of my cars and trucks. I value their products and when we bought our new Toyota Highlander earlier this year, the first thing I did was order a new K & N filter for the car. Changing it out from the factory paper filter was a breeze, took all of a couple of minutes. I will never change my practices of using K&N air filters.
Joel Reeves, Wisconsin
This is the 3rd one I've purchased. Love not having to replace them.
Lee Dolce, Lincoln, California
Good fit, easy installation. Less expensive than having the dealer install their unit every 10K @ $35.00 a pop.
33-2443 K&N 33-2443 Replacement Air Filter
List Price: $85.89
Your Price: $55.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Skip, Virginia
New K&N filter was put into a 2012 Grand Cherokee with a Pentastar V6. Vehicle had 6,000 miles on it. Have put appx 800 miles on the Jeep since then. Have not noticed any HP increase but seem to be getting about a mile per gallon more. The engine was quiet to begin with but is actually quieter now. Acceleration was smooth before but is a little smoother now. RPM at idle is a little lower and the tranny doesn't downshift so much when climbing slight hills. Overall the tranny shifts smoother.
Campjeep, Columbus,Ohio
It is like a ( Breathe Right nasal strip) for your jeep. 2011 Jeep Grand Cherokee, 5.7L V8 HEMI. Just enough more airflow for an increase in throttle response (performance). I see better fuel economy over the very thick stock factory air filter. Seems to shift smoother, faster with the K&N filter. I can not think of anything else for the money that gives you the return that this air filter gives. In my old 97 and 99 stock Cherokees 6 cylinders in Leadville,Co at 13,000+ feet there was one trail and at the end was a hard climb ( Had to use full throttle ) where the stock Jeeps with the K&N air filters would give you just enough more air flow ( where the air was very very thin or a lack of it ) a really nice advantage over the Cherokees 6 cylinders with the stock air filters. It sounded like the engine sound where it was sucking air was in slow motion. (The lack of air would just rob the jeep of any horsepower and it felt like you were moving in slow motion also.) But the ones with the K&N filters would make it to the top. This will always stick in my memory... Thanks for reading.
Kent, Wisconsin
Fit of filter was perfect. Noticeable throttle response improvement as well.
33-2457 K&N 33-2457 Replacement Air Filter
List Price: $83.29
Your Price: $53.99