The swaybars work with the stock SVT suspension. The front swabar is a little loud though due to the poly bushings, so with the rough roads it might be a bother.
I'd get the whole kit though, better value, plus the handling is amazing. Thats the setup I'm running and my only complaints are the loud swaybar and the tad harsh ride+more noise, but the handling is more than worth the hassle.