Well, I was going to get the wix 51056, but napa wanted $11 for it!!! So I asked about the 51516, but it's about 2" taller than the 51056, so it will interfere with my side panels. I take it you guys with the twin engines must have the filter in a different location so it won't interfere with the panels? Oh well, I'll just run to the dealership, I think they're cheaper than napa for the kohler filter.