you just screw one side into your tie rod and the other side into your ball joint. its easy. i would suguest that you re-enforce the threaded part of the extension that isnt threaded into your tie rod. mine bend on my first ride.
Oh also dont try to force them into the tie rod all the way...The threads on the extension are longer than the threads on the tie rods.
well its the rod extensions that bend. and we couldnt complain for less than $400.00 we got everything we needed for 2 blasters. not as good as a-arms. ill get them one day. i just havent found a good deal like you.
Word of advice,Do Not Use Them.Mine broke and i didnt have them that long .8 months tops.I almost ran off the side of a cliff .They should not sell the kit with those extentions.Just go out and get a new pair.Heres a good place to order a cheep strong pair 40$ http://www.cfmracing.com/blaster.html.