Of the 5 different cars I've put hitches onto, this was probably the easiest and cheapest ($187+free shipping from Napa!). I did it by myself in about an hour, but it would REALLY help to have 2 people. Didn't need to remove exhaust.
It turns out that the pump thing isn't a big deal, it doesn't need to be trimmed or anything, the hitch rail doesn't interfere at all, nestles perfectly right up above it.
There are 2 nuts holding the bracket for the pump. Remove the one farthest rearward, and loosen the other one. Now it'll swing to the side and let the hitch through. Also it will allow you to insert a bolt that is otherwise impossible to get to.
Now angle/maneuver the hitch into place. I had to use a little "physical persuasion", lightly thumping it to get past the exhaust (it rubs a little on the way by but nothing terrible or damaging at all). Then screw all the bolts in, and reattach the hanging pump bracket.