The most effective way I've found to drop intake temps is to spray a methanol/water mist solution directly into the intercooler. I tried misting into the intake pre-TB first, and wasn't near as effective.

I got my kit at alcohol-injection.com, with progressive controller, after shipping was a little over $300. I really like it though. I can post more info if people are interested.

I attached pics on where I installed mine. As I said, directly into the intercooler. Sorry the pics are blurry, didn't realize it until after I put everything back together.

- Rasoul