Hey, I've got an 04 5AT G. So far, I've put on a Stillen catback exhaust and an AEM CAI. I was wondering what other low-cost mods I can do to add a few HP. I really don't know what I am doing, so bear with me .

I've heard about the JWT Pop Charger? And the K&N Drop-in filter? Thoughts about these? Any other suggestions? I don't want anything too expensive.
And also, any idea how much HP gain I got from the intake/exhaust?

Sorry for being such a newbie

 

No reason to apologize for being a newbie. Do a search on each one of your questions and you will find all this stuff has been discussed to death.