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
James Belk, Atlanta, Georgia
Great product does not hold moisture like paper filters and gets rid of dampness
David Doescher, Iowa
A product that you know is good K&N . Plan on purchasing one for my 2012 pickup.
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.
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
Emilio Rodriguez, New Jersey
Good product. I would buy again.
Anthony, Madrid
I would not put any other filter in any of my vehicles. I have been putting K&N filters in for over 15 years. I save a lot of money on buying air filters and at fuel pumps. You see better fuel mileage and power when you want it. I just try the oil filter for my truck, 6.7L. I see a lot cleaner running truck. It runs smoother. The factory oil filter did not hold up to the K&N oil filter. AND NO, K&N did not pay me to write this. Thank you K&N.
Eddie Zimmerman, College Station, Texas
Bought it for my wife's new vehicle. Saw an immediate increase in mileage and performance. Have used your filters in all of my family's vehicles for years.
33-2457 K&N 33-2457 Replacement Air Filter
List Price: $83.29
Your Price: $53.99