[OhioDmax]

I did that with the 02 I just traded off......I noticed it seemed to spool up and get down the road a little quicker.....No hard numbers or data just good old fashioned, "Gee, this seems a little snappier than before!"......May be no improvement at all but to me it seemed it did help a little

 

[OhioDmax]

I'd say you should do something exhaust-wise if your going with a performance upgrade like the "Juice"......Do you plan on working the truck hard or just doing it for fun???? If your going to work it hard you may want to consider a 4" system vs. just straight piping sans muffler, as the upgrade is sure to increase EGT's considerably and this could have a negative effect over time......I'm sure there are others on here that could be a little more specific as to what your needs would be if you intend to work the truck hard.