i sell those - as does centerline. am guessing you did not get from me because i send instructions w the parts - or i forgot to include them, apologize in advance! as alfaparticle says, call vendor, they will help. in any case, the center tube is a press fit as is oem bush. remove oem - the bush will probably tear off the center tube - which is good, because the center tube will be FIRMLY affixed to the bar end and you will have to cut the center tube - at least part way through - to release it enough to allow you to drive it off the bar end. the poly bush is 2 parts as you can see. one part is bonded to the center tube, the other is a slide on. in the link upper eye (bar end), put the bonded piece into link from outside, the slide half on from the inside. the press fit will keep the whole thing together when you install on the bar end. on the control arm end, do reverse - bonded side goes on inside... slide on from outside. put washer and nut on as oem. drive fast, have fun. came up with these after hit a pot hole in my milano and the oem link popped off the bar end. have sold a bunch of these over the years, as far as i know, all still working great.
if want, email me (firstname.lastname@example.org) and i'll send you the install blahblah.