K&N parts matching Napa 6556 air filter

The Napa 6556 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Napa air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter-Hdt
  • Washable and Reusable
  • Easy to Clean
Terry Beebe, Louisiana
I am very pleased and very impressed. I installed this in my semi truck my fuel mileage increased dramatically I have more power and the fuel mileage has increased. The truck also runs a lot smoother . I am saving money by using less fuel I also am saving money in the long run by not having as much wear and tear on my engine from straining trying to breathe. Plus the cost of not replacing the air filter every few months.
Robert Emmert, Arizona
Hi: I was excited in obtaining this Air Filter as I would not need to oil this unit. That will be good to experience when the time comes. I was not prepared for the long wait for delivery. It took a few weeks for the product to be delivered. I then received a e mail that new purchases would include your K&N cap. Great So I sent an e mail to K&N for a hat. I figured if I had to wait a number of weeks for this air filter and not make a motorhome trip(old filter was sand filled), I would get a good will 'hat' for my patience. I have not received any messages of my request. So, the air filter looks solid and the size is exact. I would still like the K&N hat. Thanks, Bob Emmert
Robert , Virginia Beach, Virginia
Awesome! Lasts long enough to pay for itself several times over versus paper filters.
38-2012S K&N 38-2012S Replacement Air Filter-HDT
List Price: $240.99
Your Price: $179.99