Just cut a hole in the Hood
, and have some kinda scoop, or hump made there out of fiberglass.
I'm sure your local import shop can do it for a few hundred. Isn't the Vibe a Pontiac?
Pontiac Vibe shares the Toyota Matrix build.
You could do it, but good luck getting it under the Hood
Plus, you'll have to find someplace to install it, unless you know how, there isn't a single person here with the TRD