excuse my stupidness but im new to my 350 i have only worked on hondas and i have a couple of questions.
1) the aps plenum is there only one piece to the plenum
2) the popcharger is it just the filter and if it is if i only buy it do i need any other parts

 

also where is the best and cheapest place to pick them both up

 

There are several one piece plenums, and as a matter of fact, aps is a upper plenum only. Crawford, APS, SFR all make plenums...as well as Kinetix. Kinetix also makes a full plenum replacement, upper and lower at a premium (860 shipped).

Popcharger is just a short ram intake w/ a heat shield. It comes with everything u need to install it. Its great btw, i have it.
I also have the kinetix full upper-lower plenum. Its werry shiny :-D. Plenums right now all perform bout the same although the kinetix SSV has shown to be much better for FI...but a lot of people are questionable about that. I believe their claim, afterall it is SHINY!
Stillen makes a short ram similar to popcharger but w/. a much better heat shield. popcharger though is best bang for buck.

 

check out www.intensepower, performancenissanparts or forgedinternals for some good prices and excellent customer service.