they fu*cking suck. I know because I had them. Ball joint died and the arm itself bent.
Here's what you do:
1-Get the phone number to Junk2
2-Pull down your pants
3-Call them and ask how much they want for new ball joints
4-Take the price up the ass

I threw mine out, sent them a nasty letter, and bought the then new SPC arms instead, which have joints that are easy to replace...and theyre MUCH better design