This came off of a customer's Toro Timecutter zero-turn with the 24hp Kohler Courage V-Twin. It was in use for at least 2-3 years. These filters list on Amazon for close to $10, and are likely more at local small engine dealers. They are the aftermarket replacement for Kohler, John Deere, Briggs and Stratton, and many other small engine OEM filters. I wasn't that impressed with the filter media, and the bypass seems to consist of holes in the back of the media cartridge that rest against the leaf spring. The ADBV was hard as a rock and likely wasn't doing much. The oil out of this mower was jet black. It left with a Wix 51348 filter and some Napa Synthetic 10w30.