K&N parts matching Champ Labs. AF3978 air filter

The Champ Labs. AF3978 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
Lumberjack12345, Mililani, Hawaii
After I buy a new car, the first thing I do is swap the stock air filters for K&N filters. I have always been pleased with the superior quality and performance of these filters. I have used them in everything from a Toyota Corolla to a Camaro SS. They are especially useful if you intend to install a higher flowing exhaust system, because the high flow cannot happen unless you remove some of the intake restriction.
Dennis stump, York Haven, Pennsylvania
Item was on back order but became available in a few days......great air filters
Stephen M. Reus, White Plains, New York
Definitely felt increased pick up in my car. I haven't tracked the fuel economy but I am very happy overall with my decision to purchase these filters.
33-2273 K&N 33-2273 Replacement Air Filter
List Price: $73.29
Your Price: $46.99