K&N parts matching Champ Labs. AF3965 air filter

The Champ Labs. AF3965 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, Newbury Park, California
I installed this filter in my 2008 BMW 528i in under 2 minutes from hood-up to hood-down. After starting the car in the garage I didn't notice any real difference in the sound but once I started driving it I could hear and feel the difference, especially in sport mode. And as an added benefit, it looks like my fuel economy has improved by about 1 mpg. According to the car's computer, in the 1,200 miles since I put it on, my average economy has gone from 25.2 to 26.2 mpg. Very happy.
PJ, Long Beach
I noticed an improvement in horse power right from the get go. Better air flow plus I love the fact that this filter is reusable after a thorough cleaning. Great product!
Henry Rodriguez, Newport Richey, Florida
Awesome product, thanks!
33-2292 K&N 33-2292 Replacement Air Filter
List Price: $104.29
Your Price: $66.99