Distant pulse,
I may be able to help a bit with the wind noise on the DS window. That would drive me nuts for sure.

Have someone sit in the drivers seat and then take compressed air and blow towards the top of the window to see if you can tell where the leak is exacly.

Once you figured out where the leak is, you can purchase some, and I can't remember what it's called but it is half the diameter of a pencil and is black and sticky. You pull the weatherstipping loose and place this "sticky spacer" behind the weather stripping to tighten up the lose spot.

You should be able to buy this stuff at a local autoparts store. It should be a quick and easy fix from there...should work on the Xfire with a bit of trying...anything better than wind noise in your ear when you are trying to enjoy a drive.

I will look up the stuff is called a post back in a bit.

This was on the LS1 Tech website, not sure how well it translates to the Xfire, but the principals should be there, i.e. fore and aft adjustments.
http://ls1tech.com/forums/showthread.php?p=8815775
However, if you have one spot on the middle of the window, probably won't help too much.
I will keepp looking.



Hope this helps.

Cheers,
KrzyFast