K&N parts matching Mobil MA4021 air filter

The Mobil MA4021 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Mobil air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Bryan morice, Duluth, GA
So far, so good. I have not had it in the car for long, so i don't know how well in performs compared to the original,. I think it is great so far, but i just haven't had it long enough to give it five stars. I am delighted that i won't have to replace the filter anymore.
Tiago Boiça, Linda-a-Velha, Portugal
tudo certo
David Howland, Springfield, Pennsylvania
Great filter, perfect fit.
33-2378 K&N 33-2378 Replacement Air Filter
List Price: $90.99
Your Price: $58.99