This is a replacement kit for all the rubbers used on the front and rear struts/shocks on a 300zx. These parts deteriorate with age and should be replaced when worn (or when replacing struts/shocks) The kit consists of :- Front struts Upper strut mount x 2 (includes upper spring seats) Upper strut mount isolator x 2 Dust boot x 2 Bump stop x 2 Rear shocks Upper spring seat x 2 Upper shock mount isolator x 2 Lower bush x 2 Dust boot x 2 Bump stop x 2 I bought these for my track car project which has now been abandoned $395 plus postage PM me for details or if you have any questions