SuperDust22
The Power of Pixie Dust?!
It will have to be a really stout combo to hit 400 N/A. You will have to really plan things out. You can't throw thing together. And if you are looking for 400 I wouldn't go with the cobra intake. Look at peoples combo's on the FAQ. Is this your DD or do you want to take it to the track a lot? A 331 kit cost the same as a 347. The 331 is more reliable. I would also focus on toque. HP isn't everything.
Dustin
Dustin