First to answer the thread, you will not have room under the hood unless you do heavy modifications to do a Twin Turbo setup, second... its too much of a hassle and its alot easier to get a single turbo kit for hondas. I have seen pictures of a twin turbo civic, but it was a professional race car.

And the hype about Two is better than one......

Depending on the sizes, some twin turbo setups can be real nasty.. For an example, for supras HKS has the 2835's (and bigger models) that produce some nasty nasty amounts of power.... if any of you guys have seen the videos of the Supra beating the Busa.. he had a 2835GT twin turbo setup... but yea, one big turbo is alot cheaper and easier

Just look for a turbo kit for your car and call it a day. Comes with all the parts you want.