For some time, K&N moved production from the American company Champ Labs to a Korean company. There had been several reports of issues after the move. Well, K&N has started using Champ Labs again which is a good thing. My filter, HP2010, was made by Champ Labs. Champ Labs is also the maker of Mobil 1 filters, and after talking to their tech support, I would say there is a good chance the K&N and Mobil 1 filter are exactly the same. The only differences I can see are the K&N comes with the 1" nut on top and the filter comes in a sealed plastic bag inside the box. My filter was also $3 cheaper ordering online vs buying it in store. This makes it the same price as the Mobil 1 filter.