I thought that I would pass these simply mods along to my V6 brethren. I have 5K miles on my GT with these mods & they have made a tremendous difference in the way my car performs & in MPG. No check engine light. I assume you would be able to do similar mods even though it is the V6.

Hope this info helps someone out.

Exhaust: Pics on page 2.
http://forums.bradbarnett.net/index.php?showtopic=10996

CAI
http://forums.bradbarnett.net/index.php?showtopic=12644