I still think everyones money and time and effort would be better spent elsewhere.
As said above, you might see 2 or so HP from this, but that could be fluctuations from one session to another.
I still maintain in my opinion, having dealt with all sorts of cars, (Mitsubishis, toyotas, mazdas, nissans), it isnt worth it. Ive never seen a car where it showed solid proof that a TB spacer and coolant bypass mod did ANYTHING concrete for.
Not trying to rain on anyones parade, but I feel that strongly about it. Look at the people that have posted about it having done it. They dont even notice its there. It could go one way or the other. Their "butt dyno" doesnt feel a difference. That means the placebo effect isnt even strong enough to convince me its worth it.