Um, you gonna scan that? I had kr on a 3.4 with headers 180* tstat 104s and ported blower. If your running just a downpipe unless you can scan your car I would not run below a 3.5 pulley just saying.
And read this thread before you start modding stuff. http://www.grandprixforums.net/safel...0-a-67580.html
And idk what is up with headers right now but the price they are asking is ridiculous. I paid $200 for mine new, right now they are $438......