K&N parts matching Champ Labs. AF4038 air filter

The Champ Labs. AF4038 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
Michelle, Queensland, Australia
I have had these filters in my Nissan 370Z for 3 years and I notice the little extra performance and nicer engine sound (even though it's only slight, I know my car and it's definitely an improvement). Never had any trouble with filtration quality. I can't speak highly enough of the customer service I've received using this website either.
Ron Janicki, Oro Valley, Arizona
I have been using K&N Filters for more years than I can remember.
WILLIAM KELLER, Costa Mesa, California
Easy installation. Immediate increase in economy and performance
33-2399 K&N 33-2399 Replacement Air Filter
List Price: $90.49
Your Price: $58.99