J.Frink

Yeah, that's what I've found too. Looks like the cat is integral to the exhaust manifold, sort of like the cat is used as the manifold plenum. I'm guessing that this would put it in a pretty inconvenient place? In the attached image, I believe the cat is the un-numbered squat cylindrical-ish thing that's near (but not indicated by) the "5".

I just acquired a 2012 FFH with 103K miles. Previous owner was diligent but I don't think it's had any of the recommended 100K items done yet. Before I dive in, I'm wondering if there's any consensus about things to (not)do, more/less frequently, or differently than the schedule says? For example, the schedule says that the air filter never needs to be replaced or even inspected. For real? And there seems to be no recommendation to change the transmission fluid. I'm happy to do neither, but perhaps experience has shown otherwise? Saw one comment saying don't bother changing the spark plugs at 100K unless ... not sure what the unless was. I must admit that there's a great tendency to skip the "multipoint inspection" items, other than fluids. Probably should fight that urge, no? Any of the maintenance items such a PITA that I shouldn't consider doing them myself?

Same question as OP, so thanks for this post and I'll be following. Just having the cat under the engine doesn't seem like it would deter thieves ... perhaps access is obstructed? Or it's just a less common/less valuable cat to steal?