Has anyone seen this before? factory lower control arms on a 2000 Cavalier. Both ball joints riveted. the right arm is the same as the left except the ball joint is installed to fit on the right. 1st time I ever seen this or is it how they were installed? Mechanic said my rear bushing was popped but I just put it in. he refused to look at it and confirm that it was upside down as compared to the right.