K&N parts matching Champ Labs. AF3999 air filter

The Champ Labs. AF3999 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
Chester Humphrey, Allentown, Pennsylvania
Great Product!
Miguel Ángel De Alba Martínez, Mexico D.f., Mexico
Great the car feels smooth and saves me a lot of gas.
Tim Maloney, Lodi, California
As always awesome product.. Run in all my toys... Thanx
33-2331 K&N 33-2331 Replacement Air Filter
List Price: $78.19
Your Price: $50.99