stillen sways do not come with bushings. however, you can order them with your kit through them and they are polyurethane (vs the stock rubber). Some have said the poly. is a bit more stiffer than soft stock rubber bushings. However, if your stocks are not cracked or in bad shape, just reuse them there wont be much difference, if any.

 

The stock "rubber" bushings aren't soft in the normal sense, and are almost as stiff as the polyurethane bushings, and as a bonus don't squeek, so unless your bushings are seriously shot, the OEM's should be fine to use.