You need a manifold, a turbo ( I recomend at least a t3t4),a down pipe, tuning (including fuel injectors,fuel pump, and tuning evice such as hondata)..Uberdata is cheaper but requires more rersearch...)
2.5:" exhaust will suffice for a stock motor....
Tune with a quality tuning device such has hondata,aem, or uberdata and you'll be good for 300whp..
Also you need a intercooler, blow off valve, charge pipes.....