Tune + intake = better results than intake + stock tune
The tune is the biggest bang for the buck as far as adding power
Downpipe would be next
And then intake
T.O.P. was already discussed here:
It's a "last thing to add" mod...after you've done the tune, downpipe, intake, etc.
The gains of 6hp....you won't see that on a stock tuned or even stock (K03) turbo'd car.....that was on their K04 (bigger turbo) project car
You might see better turbo response...that's about it....minimal though