K&N parts matching Luber-Finer AF3940 air filter

The Luber-Finer AF3940 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
James Arbogast, Hooksett, New Hampshire
Fast shipping. Easy instillation. Great performance
George Cambria, Brooklyn, New York
Awesome filter in my S5 with Stage 1+ 2, with supercharger pulley upgrade, made a big difference in air flow to the supercharger in low and high speed acceleration.
Danny Niner, Laurel, Maryland
Installation in my Audi S4 went very smoothly. Only irritation was getting the old filter out of the housing as it did not want to come out easily. I have not driven the car enough yet to see any impact on fuel mileage. I have seen a 1-2 mpg improvement in my other vehicles when I installed the K&N.
E-1987 K&N E-1987 Replacement Air Filter
List Price: $102.79
Your Price: $65.99