beach bum gman wrote:It's an auto. Is it better to get the top and the 5/16 spacer together or is that overkill. Will the bottom still work on the automatic?
Getting the kinetix upper and a spacer is not advised. Plenum volume becomes too high - 30% increase for the kinetix + whatever the spacer adds (5/16" x the area of the plenum).
If you go with the kinetix, be sure to get a newer one. The older design was very flexible and susceptible to thermal expansion which made for possible vacuum leaks. The newer design is advertised to be much stronger and less prone to thermal variation.
Check out the link in Joe's signature for the Mod Database.
"Inexpensive" mods for the 5at (automatic) would be
JWT or Stillen Intake w/ z-tube (350z intake tube)5/16" Spacer (followed by the MREV2)Grounding Kit (see my signature)
From there, everything pretty much takes a big jump in price.