The stock equipment has a decent flow rate, so with mods the only benefit for the V6 would be at the top of the RPM range at wide-open throttle. Anything less and the stock components can perform just as well.
But how frequently do you accelerate with wide-open-throttle all the way to redline? Even then, you don't know if there's a benefit without dyno'ing it, since the benefit would probably be very few horsepower, if any.
Anyone who has done a lot of mods while using a dyno to test the real results can tell you that any mod may have no effect at all, or can actually reduce power -- regardless of what the seat-of-the-pants impression is.
And even if you did gain the benefit, you'd have to put up with increased exhaust drone in the cabin all the time for a benefit that you'd only have on rare occasions of maximum acceleration to redline.
You really have the best combination of performance and cabin quietness that the engineers could come up with for a V6. I would enjoy it as it is.
Cape Canaveral, Florida
2005 Jeep Grand Cherokee Laredo 4.7L
2005 Dodge Durango SLT 4.7L
Last edited by Intrepidjeep; 11-09-2006 at 03:45 PM..