On my gb270 it came with an uprated rear anti roll bar, does anybody think that changing to a whiteline one will make any difference?

 

On my 2007 WRX (not GB270) got Prodrive springs and also have uprated the front and rear ARBs to adjustable 22mm which I think is a higher rate than the uprated GB270 rear ARB. The combination of the springs and both ARBs has made the car more go cart like. Corners much flatter and turn in is now much better.

Hope this helps.

 

24 mm rear bar with alloy rear d/links and 22mm front bar ,use standard front drop links
cheers geo