K&N parts matching Champ Labs. AF4031 air filter

The Champ Labs. AF4031 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
Jim Hill, Houston,Texas
I have used K&N filters in my LandCruisers for many years. They are great. It also seems that my gas mileage has improved which is a help since my vehicle doesn't pass a gas station it doesn't want to meet.
Richard Campbell, Herndon, Virginia
Awesome quality. Process to order and deliver was exceptional.
Thomas Grieve, Euless, Texas
THESE 2 FILTERS WERE UNBELIEVABLY EASY TO INSTALL ON MY 2007 5.7 LITER SR5 TOYOTA TUNDRA. I'VE NOTICED A DIFFERENT TONE TO THE SOUND OF MY ENGINE. I NOTICED A CHANGE IN THROTTLE RESPONSE. I DEFINITELY WOULD RECOMMEND K&N FILTERS AND WILL USE THEM IN THE FUUTURE.
33-2387 K&N 33-2387 Replacement Air Filter
List Price: $91.99
Your Price: $59.99