Whats the difference between the two? What makes a F1 so special? I know it makes a little more power than the D1SC? I'm slowing thinking about some larger upgrades for my 2004. Is the D1SC more for stock motors and the F1 then for the built up stuff?

Fin

THIS (http://www.procharger.com/models.shtml)page should give you all the info you need.

I had not been to that page before. Also was surprised to not see a big difference in HP figures between the two. Biggest difference I could see is the F1 can handle up to 6 lbs of boost more than the D1SC.