hey all, im lifting my truck with a 6 inch fabtech lift, and im starting the process. im getting stock tie rods (cant afford others right now) stock pitman arm, and cognito motorsports idler arm assembly. and the guy whos helping me said get unit bearings? i dont know what these are, i know there are hub assemblys but im really not familiar with my IFS. he has a duramax, and all his buddies do too so im trustin him on this one. anyone wanna explain what they are to me? thanks.