^Indeed Al, indeed.
This is the overall plan behind that Borla Hush I bought (also got that JDM hazard light switch in the same deal); it’s used and is leaking at the slip fitting, so that will be getting welded up. I figured this exhaust would be perfect for my plans as I was planning on building something similar, this ended up cheaper ($250 shipped for exhaust and the hazard switch). On to the plan though; this is a rough Paint job of what I want as a result:
It's a rough illustration (think I made the tips a little smaller looking than they really are), but basically there is a way to run exhaust up a little higher in the bumper (little bit of metal removal required, and mounting point changes will be required), and make a little CF lip (the gray oval in the picture) around the exhaust. I'll also have to do some plastic welding to close up the bump on the bottom, but it will remove the exhaust from hitting out on the trail (plus I dig the look after seeing another GD STi with a single tip exiting in the same way - mjfubar on IWSTi).
This should illustrate how much metal will be cut out (and braced):
I'm figuring I should be able to chop out at least 6-10" above (to that spot pointed to in the pic, maybe a little higher; I'd weld a brace across the bottom of the hole (and weld shut the cut if there is more than one layer anywhere)). If it comes down to removal of the bumper bar, I'll make a tube replacement (I was considering making one anyways).
And some parts pics to hold off the pic-hungry, until I can put said parts in:
Killer B Oil Pan, Pickup and Baffle:
TSS Weld-on Strut Mounts and Trailing Arms/TA Mounts:
And a collage of some of the other bigger (read pricier) components: