-kinetix intake manifold $450
-kinetix high flow cats $350
-any cat-back $800
-dc headers $500
-crank pulley $150
-any cold air intake $250

you can get alot of bolt-ons for under $2500.

-light weight flywheel and heavy duty clutch(tilton 8lb) $2000
-350 evo gears w/ nismo diff $2000

Thats what you call a 12 second N/A 350 z! about the same cost as a shitty supercharger, through a hundred shot on that setup and you will dip into the 11's for about $6000 in total bolt-ons. not including install $