K&N parts matching Champ Labs. AD3984 air filter

The Champ Labs. AD3984 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
Bryant Sutton, Lake Jackson Texas
Install couldn't be easier. Post install there is noticable extra power when accelerating to pass at freeway speed. No figment of the imagination as my wife and dad also noticed (and didn't know I put in a new filter). Getting an extra 3 miles per gallon highway haven't noticed an increase in city MPG.
Jeff Harris, Greenville, South Carolina
Works great, and the engine certainly feels quicker on its toes! All valuable for the added strain of big roof loads. Had a K&N on my last ride too, and they really give you bang for the buck! The filter's ridges don't run the same direction as factory, and the filter is only almost square, so installation is tricky till you figure that out!
Shaun Helbig, Australia
Great filter. So much better than the paper original. I get almost 10% better mileage over my old filter. Given that the old filter was fairly dirty this does not surprise me. Better engine response than before as well. A must have for your vehicle!
33-2304 K&N 33-2304 Replacement Air Filter
List Price: $77.99
Your Price: $50.99