Can someone please tell me how to install spring spacers on my rear springs. Do I need to take off the springs and they sell them 4 to a pack. Do I just use one on each side or can I use two on each side ? I have 20" rims and the tire rubs.

 

most of the time yeah you have to take the springs out. but it depends on the year fo the car also.

If you have struts in there i have heard you have to change them out also.
the spacers are just that,
You would have to get them in on the bottom or the top of the spring. and mostlikly they are for the front and rears to

 

I have a 2000 Monte Carlo SS