Most of the Briggs, Kohler, and Kawasaki filters have the same specs, except for the height of the filter. I have started using the WIX 51348 filter (3.4" high) on my mowers. I ordered some from Rock Auto as part of a bigger order for around 5 dollars each. The WIX filter listed in a previous post (WL10068) is 3.2" high. Other WIX filters that meet the specs are 57035 (2.3") and 51056 (2.7"). If the WIX 51348 filter works for you, it's also used for various autos, so you can find a cross-reference in many brands (FRAM, AC, Motocraft, Purolator, etc). Of course, when cross-referencing filters, you should verify the specs. I'm also switching over to the WIX transmission filter (WL10102) when I change the filters on my Hydro-Gear 3400s next (maybe tomorrow if I can make the time). These cost me 10 dollars each from Rock Auto. Both the 51348 and WL10102 filters are labeled as made in the USA for those who care (NOT CHINA).