Wow, for 700hp I'd be willing to replace a starter now and then :-D Plus, it being in a wagon makes it even cooler (to me, anyways).
I know folks have used the multi-layered cookie sheets to make heat shields with. That, plus a silica fabric or reflective wrap ought to help.
Is the routing of those headers something that was done to have them properly tuned?
Good luck, I hope you straighten it out. If not- I hope you buy the lifetime warranty starter, so at least ya don't have to pay for it each swap!