Rag joint question

[s10cyncrvr]

I just installed a 800 series box from Lee's. I'm thinking about replacing the factory rag joint with a high perfromance one from them. Do you get the enitire rag joint assembly? or do you cut apart your stock rag joint and replace the disc? Anything else I should know about the swap? This is in an 02 S-10 by the way.