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
Goran Mandura, Twin Falls, Idaho
Excellent air filter for my Detroit Diesel S-60 engine. I replaced (Brand Name) air filter with this one because it is easier to clean and it gives it really good air flow, which improves throttle response, performance and fuel mileage, for a sensibile driver. The price is reasonable and the shipping was free. Good deal.
Scott Strange, Charlotte, North Carolina
Very hard time getting correct part number for my vehicle. Old K&N Number not cross referencing with new K&N number??? Great product, would not have gone through hassle of tracking down correct part number myself if filter wasn't worth the effort.
James Tallcott, Quincy, Illinois
This is the second one I purchased. Replacing the first one after three and a half years. Does a great job.
38-2012S K&N 38-2012S Replacement Air Filter-HDT
List Price: $240.99
Your Price: $179.99