hey, i saw this mod and in the description it says it adds 5-8 horsepower. i am very skeptical about this. does anyone have any information on it? if you do, please let me know. thanks.

Doesn't do as much until you get more mods. I would at least have Y pipe, intake, ECU, some kind of VIM, etc.

well, i do have many mods done...

For the money its worth it, (like 70 in the recent GD)

It makes it very noticable when you have all the other little bolt ons, but it is still good by itself.