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
Joanna, Alabama
Never have to worry about changing my filter again! Love it!
William Keller, Costa Mesa, California
Quick delivery. Filter appears to have increased the economy (gas mileage). Completely satisfied with service, purchase and ease of installation! Great product. Been using your filters for many years!
Ray Novak, Minooka Illinois
I use K&N in all my vehicles . Love that it's made in USA. Better gas mileage and throttle response. Just wish I received another sticker with last purchase tho.
33-2378 K&N 33-2378 Replacement Air Filter
List Price: $88.69
Your Price: $56.99