Thats the question - is there a noticeable difference between the 3.5 vs the 4 ? and if there is, is it just because the iat was moved further down or because of the increased air intake ?

It's still going into the same size TB, so you won't see the big difference unless you upgrade to the 90mm TB. But have fun shelling out 1000 bones for it :p

....no real difference.

maybe I am not qualified to say, but I saw back to back at the track, and no noticeable difference.

Because the regular is so good for one, and 2ndly the motor can only suck so much.

....but if you are going to buy one new, might as well get the big boy.

...but positively not worth the $$$$ to trade smaller 3.5 for 4.

Maybe that helped? maybe i'll get flamed for never having either?

The IAT being moved helps, but a simple drill and some... :worried: duct tape can fix that :p

^ thats what i was thinking, that the small benefit comes from just moving the iat further down....My 3.5 is good for me till that vortech kit comes out :D

That's a big thing for every car; W-Body, F-Body, et al.