How would these headers help my car performance wise, as in hp and torque. I know how headers work, but i don't know thier exact statistics in helping out power wise.
with just flowmasters, you won't even notice a performance gain from doing them. With what I have in my sig, I wish I had not gotten the MAC ceramics and taken that 400 bones and picked up a Trick Flow streat heat manifold instead. Either that or you could pick up an o/r X or H and a 65mm TB. Pullies are only 100 bucks... short throw shifter 200, GEARS 400 including install, etc.
I found these pulleys what do you think? Would they work on my AODE, or are they only for 5 speeds. Also, it says 8-20hp gain, how much would these give me?
You WILL feel the difference. But while you are getting them, I would get an aluminum set instead of steel. Much lighter and not that much more. I have my ASP aluminum set on my desk waiting to go in and it was 93 bucks to my door.
I got mine from racenet.net.
The pulleys have nothing to do with your transmission, don't matter 5speed or aode.