yea i have a ST rear and you have to drill new holes in the LCAs cuz the bar is bigger than a factory bar, therefore the holes need to be further apart... took maybe an hour and a half to do, including turning the shocks around and drilling and all that..

and yes you can have tie bars as well.. i have the neuspeed one.. ST also makes a rear sway/rear tie combo.. it won an award at SIMA.