2006 6MT Coupe

Suspension Mods:
Hotchkis Sway bars
Tein S.Techs
Bilstein Struts (Only on front)

As the title says, the rear end of my car wobbles back and forth over any significant bump in the road. This issue has gradually been getting worse. I know this problem has come up before, seems it's the rear control arm bushings. Can anyone confirm if replacing those will fix my problem? Also, is it wise to do all the rubber suspension components at once?

 

Most likely the rear shocks need to be replaced. If it was just bushings you would hear a clunking noise every time you went over bumps of any sort.

 

Replace your rear struts and have your alignment checked.

 

I'd check the rear end links as well