Mate,
First off you need to know what your future goals are intended for your car.
Do you wanna have a 300kw weapon? Or do you just want a ordinary daily 200kw Skyline?
Many of times i've seen people buy upgrades for their cars and have wasted money as their intentions have changed, whether it's due to more power or selling the car!
If you want the best from 11psi, let me suggest this.
You already have exhaust
- Air Filter suggest Apexi (ain't shit unless you have it boxed off with some cold air going straight to it)
- ECU not needed, Re-Map is fine. There is a guy on the forum in Melbourne..Dr Drift...he does Nistunes and will re-map your standard ECU.
- Spark Plugs gapped to 0.8mm
- Have a VERY GOOD look at your coils..are they split?...good working order?..If not, invest in some Splitfires as these are a common culprit to missfires.
- Exedy heavy duty clutch..better to change it now otherwise you'll be left on the side of the road with the smell of burnt clutch in no time.
- Brake Pads..Greenstuff, Ferodo, Bendix, tehse are good brands, anything in their Top of the line range are fine.
NO GOOD GOING FAST IF YOU CAN'T STOP FAST.
Now if you want to enjoy your power...upgrading handling will be better than any performance upgrade HANDS DOWN!
Invest in Coilovers..Expect to pay $2000+
Swaybars..best bang for buck.
HICAS lock bar...
All these parts if correctly tunes will combine and unite into a very enjoyable street car.
Hope this al helps.