ok mate listen up
you have an NA R32 - that's probably the rb20de engine.. not really a lot to work with here. sure your car still looks great, handles great, and probalby stops great too. but it ain't got much balls.. there's not really much you can do about it unfortunately
stock rb20de probably will make about 80rwkw given its age
to make the most out of what you have, i'd suggest:
- extractors, high-flow cat, 2.5" exhaust ($1000)
- high-flow panel airfilter in stock airbox ($80)
- ECU re-tune and time on the dyno to adjust base timing etc. ($500)
that should bring you up to around 100-110rwkw if you're lucky
my advice?
drive and enjoy what you have, and save for something a bit bigger and better later on
in the mean time read as much as you can on SAU because its clear that you don't know too much about how cars work. use the search function of the forum before you ask any questions and you will find more info than you even need. at the end of the day don't be afraid to ask something even if you get bagged for it.
best of luck,
Warren