Universal Air Filter – Fits Donaldson, Wix 46438, Kohler, Kawasaki FX & FD Engines

Need an air filter for a small engine but tired of hunting for the exact part number?

This one crosses with a ton of them.

It fits models like Donaldson, Wix 46438, M131802, AF25551, CA9550, P821575, and 224285007.

Basically, if you've got a Kohler Courage engine or a Kawasaki FX/FD series (think FX651V, FD731V, FX751V), this is likely the one.

It's a universal replacement, so always double-check your size, but it's designed to fit a wide range of lawn tractors, generators, and commercial mowers.

It's brand new, unbranded, but meets the specs of those OEM numbers.

Cheap and easy to swap—just pull the old one out, drop this in, and get your engine breathing clean again.

Good maintenance prevents bigger problems.