they are bolted to your rear end. jack up your car and look at your rear end. you'll see two long arms coming from the body that bolt to your rear end and on top of them you'll see 2 coil springs those are your lower control arms.
your car has them already, its getting a better set that people do, not install them on a car with none, get what i mean? they are used to hold your rear end in place as well as the little ones on top (the uppers) different style upper and lowers can help reduce wheel hop and plant your rear more firmly on launches.
the only thing that may be a pain is trying to get the bolts out of the end that goes thru the rear subframe. if those are rotted out or the bushings are seized to the bolts it'll take a torch to get them to budge. you may be lucky though and the bolts will come right out. in which case you'd have to support your rear subframe, drop your shocks and lower the rear end some to take the springs out.. then once those are out support the rear end with some more stands and remove the retaining bolts for each control arm. i've done plenty of rear end swaps in my driveway, definitely helps to have a helper 4 jack stands and a nice jack and a little torch just in case.
Last edited by kyle89gt; 05-08-2010 at 10:49 PM.