K&N parts matching Champ Labs. AF3978 air filter

The Champ Labs. AF3978 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
Herbie , Philadelphia, Pennsylvania
I have been purchasing K&N products since 1995. I have yet to have a bad experience with any of their products. I would truely recommend K&N filters to anybody whom wish to get the most out of there vehicle's intake system. K&N is money well spent.
DKL, Elkhart, Indiana
I installed these filters in my 2015 Jaguar FX, AWD, Sport, during the cars first service appointment. Changing out the OEM filters wasn't required at this service appointment, but was blessed without hesitation by the service manager, as a result of K&N's outstanding performance history. I installed a K&N cold air intake and filter in my previous car (Honda S2000) which greatly improved performance, providing the promised bump in HP and gas mileage, not to mention the additional growl prior to 6000 RPM's when the VTECH kicked in. I highly recommend K&N cold air intakes and/or filters.
Bob Shaw, Austin, Texas
Quick and easy shopping experience. I always install K&N Filters in every car I own. I've been doing it for years and the cars wear out long before the filters ever will . Thanks.
33-2273 K&N 33-2273 Replacement Air Filter
List Price: $73.29
Your Price: $46.99