It's absolutely time for a fuel filter change on my tractor, so I figured I would go ahead and do the air filters just based on age, not hours. There are many options online, some look a little questionable and I'm avoiding them. I remember the air filter being a ridiculous price at Napa, so when the Wix cross referenced filter came up at almost $50 for the inner and outer I wasn't surprised. But then Amazon also kicked out a Kohler replacement set, both filters for $14.00? Bargain or bunk?