mate are you sure your not hooning around n shit?
a yellow car stands out like dog bollocks, and as Jar said, how many cars except for taxis, mavs car and a few VLT's, do u see yellow?
i have basically the same mods you have listed, albeit the turbo, and i have never been pulled over except for 2 random breath tests.
and i live in the dreadded "knox" area.
i also lived in altona meadows for pretty much 21 years of my life, and had never been pulled over there either. i have been followed, but hey, who hasnt? as long as you do the right thing, u have nothing to worry about. but, you do, because you drive a skyline that is illegal, and you know it. so why have a cry in the intarweb for?
if i was a cop, and saw a bright as f**k yellow skyline, modified, id certainly want to pull you over and have a look at it.
i think u got let off way too easy, with the fact that u admitted u have an ECU modification and a boost controller.
maybe your attitude when u get pulled over is what the cops give you attitude for. both times i was pulled over, i was polite, and they were polite back. it works both ways.
as chopper says, harden the f**k up.