most GTR coolers go for a min of 600... mild steel piping is crap... ur better off getting aluminium which from memory those kits from nengun come with.
New HKS Type S I/C Kit to suit a Nissan S13 S14, S15, R32GTS T, R33GTS T, ER34
600 X 301 X 76 complete with piping, hoses and clamps
77,850 yen
which is about 1,027.18AUD by telegraphic transfer or 947.54AUD notes.