i disagree... doubt gains would be substantial, i have plenty of flow mods. id like to see some real world testing to show headers over plog/d/p. not worth the cost/minimal power gains
the areas of restriction in the exhaust has been taken care of
You sound like a guy off the regal site who doesn't believe in headers either, yet *****es that their 3.5 setup knocks on a plog and is still slow.