I have a question that maybe someone could help me out with and that's the aftermarket headers for the v6, what my question is, is whats with some of them having air injection and some do not.

 

dont waste your time with the headers they dont yield much performance just wrap them and save more money your best bet is to go with internal performance(cam,gears,proted heads etc.......

 

dbaisley is right. unless you have a blower or want to add one later the stock headers can flow good up to 300 rwhp. i have no idea what air injection is. of course if you want headers jba shorties are the best, just add a www.pypes.com x-pipe and any GT cat-back and it will sound good, but you might get 10 rwhp