K&N parts matching Champ Labs. AF3221 air filter

The Champ Labs. AF3221 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Champ Labs. air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
John Duffin, Delaware
Excellent and the BMW dealer wanted $90.00 for an OEM filter. I love the technical advantage and improved flow. The only complaint is no K&N window sticker in the box... Great product, this is the sixth one I have purchased for six different cars.
Robert J Altemus, CENTERPORT, New York
Great replacement filter. Vehicle fuel economy seems to have improved by 6-7. Still early to tell. Even if there were not an improvement, I am very pleased with my vehicles running performance with the new air filter.
Tim Brick, Paradise Valley, Arizona
Great product. I purchased a 2012 x5d and was only getting 17.8 mpg - far below the stated 21 city. First tank of gas after I changed the air filter was 20.2. First thing I do with every new car is put a K&N filter in.
33-2959 K&N 33-2959 Replacement Air Filter
List Price: $94.09
Your Price: $60.99