Kit, then your chassis should have rubber bushings through the axles, and the ends of the front sway bar poked through those bushings. The Hellwig bar comes with bigger brackets to tie to the frame, and heavy steel plates that bolt to the axles. Then the sway bar ties to those plates with traditional end links. It's an easy no-drill installation and the brackets stay put.
On ours, the Hellwig rear bar also installs no-drill. I recommend Hellwig because the bars have the same specs as the much more expensive Roadmaster. You can buy both Hellwig bars for not much more than one Roadmaster. I, along with several others, bought ours through SDTruckSprings.