if you have the whiteline bars, id sugest using the whiteline/bilstien kit., it seems to work quite well with the bilstiens as they use relativly light springs.
im using whiteline swaybars in my gtr and have some jap bilstien kit with 8k and 7k springs and the bars are way to stiff on the track.
so basicly, i you got the stock swaybars ,use a good jap suspension.
if you got aussi swaybars use an aussi suspension kit