Here's what I had:
*weight removal - only 170lb of stuff - most removable interior items, except for driver seat/seatbelt, dash. [cost = 12-18 hours of labor]
*Nitrous kit (NOS brand) 5115 - 75-shot single fogger dry system.[cost = $250, bought used)
*Walbro 255L/hr high-flow fuel pump.[cost = $95]
*Home made cold air intake with HKS filter (Hotshot style)[cost = $35 in supplies]
*Hotshot headers (unequal-length short runners)[cost = 0 -bought used, exchanged for labor]
*Test pipe (2.5 inch ID -internal diameter) replacing Cat. converter [ made myself, cost = $15 in supplies]
*HKS exhaust [bought used, cost = 0, exchanged for labor]
*ACT HDR6 Clutch (race clutch, 6-puck) [cost $352 + $220 install]
That's about it. You'll see that a lot of parts were either made by myself or bought used (cheap) in exchange of me working on other people's cars.
My next installment will consist mainly of new parts. Here is a breakdown of what's next for my car:
*35,000 mile KL-03 motor + transmission - $700
*New NOS 5115 nitrous kit - $450
*New ACT R6 clutch disk - $140
*Home-made intake+filter - $65
*Pacesetter armor-coated headers - $250
*Unorthodox Racing under-drive pulley - $115
*Outlaw Racing phenolic spacers - $65
*Ported intake manifold - $0 (I'll do).
*Removed VRIS systems.
*14x7.5 drag slicks + wheels ($550)
Other things (non-performance) that will be on the car - Sinsei front end, fiberglass hood, Autopower roll bar, Corbeau seat, 5pt harness, steering wheel...