are junk. Online,they look like originals and said "extra capacity",so,I figured they were the larger filter. Wrong.......I ordered 6 last week and sent them back. They were shorter and when looking inside,most of the media was exposed. Previously,and for years with no problems,I was using a standard Wix filter #51348 for the Kohler 26 and the Kawi 23 HP motors.After doing some research,I will now be using Napa Gold 1348 filter which has the Glass Enhanced Cellulose media.Here are the specs on it. http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/Oil-Filter-Gold-/_/R-FIL1358_0183439530 S.A.E. Technical papers report the greatly increased efficiency of glass enhanced filter media for particle retention capabilities in the 4 to 22 micron range, the particle size most effective in greatly reducing engine wear. Glass enhanced media also provides the added benefit of higher levels of dirt holding capacity without increased flow restriction (back pressure). What is everyone else using out there?