refresher....

[M-type]

94 R33 gts25t m type impul sedan 69xxxkm
hks super suction intake
stock turbo
stock intercooler
stock intake mani
stock engine internals
impul 3" turbo back exhaust
blitz dual soleniod electronic boost controller

adding

replacing all vaccum lines
replacing sparks with ngk bkr7e
oil change with enos 5w40 and j spec filter
tomei hi cas lock out
aem wideband
and DYNO

[Woodly]

I may be completely wrong but aren't the plug #'s you need
PFR5G-11 - For reg
BKR5EIX-11 - For iridium IX

[M-type]

they work too..
some ppl say for more boost these are the bees knees ...
for $ 35 ill give em a wack