K&N parts matching Luber-Finer AF4021 air filter

The Luber-Finer AF4021 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Luber-Finer air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Tiago Boiça, Linda-a-Velha, Portugal
tudo certo
Theo, Midlands, United Kingdom
Fantastic boost in performance a bonus.
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!
33-2378 K&N 33-2378 Replacement Air Filter
List Price: $88.69
Your Price: $56.99