I just odered a pair Specialty Prod. EZ arm XR with ball Joint and a pair of front Specialty Prod Sliding Ball Joint for my Alignment Kit. Some1 told me that I really DOn't need it for the rear because I can use the "washer" method and stuff. I've been asking this around here before, but can't seem to find the old post. But I don't want any uneven wear on my tires though.

Would any1 please tell me if I really Need it because the rear pair will cost me 160 Total (got 35% off Nopi's Wholesale Price = 1/2 retail)