I did a comparison of an no name EBAY air filter vs a Toyota 17801-YYZZ04 filter for my 2.7l Tacoma truck. I bought the ebay no-name combo air/cabin filter for $12 shipped and got the OEM on AMAZON $14 shipped. I ran the ebay filter approximently 30k miles when I decided to change it out. My first comparison was that the OEM filter weighed 7 oz. and the ebay was 5.10 oz. im assuming because of less plies, Toyota claims a 3 layer ply, so I cut open the EBAY filter and could only count one layer, although thick there wasn't 3 plies. Also I noted that putting in the OEM filter in the housing was a tighter fit and took a little more effort to clip it in giving an airtight seal. Although the cheaper filter did work for the 30k miles im not sure if it filtered as effective as the OE filter will. These are just some observations Ive made and might help others who are thinking about using a less costlier filter for their vehicles.