After some carful examination of my seats;(I think that I may be one of the only people install these, definatly the only person to attach them to stock brackets) I am taking them out this weekend and putting the stock ones back in, the reason is because the new seats are attached the bottom brackets which are only attached to the bottom portion of the stock seats, the stock brackets are not ment to support the full seat. I am turning these seats in to two high quality office chair that will we able to sustain crashes of up to 200MPH, well at least on NFS underground. I will tell you all, I put them in I have look at the brackets that come with the seats, and I tried to install them in the safest way possible, they don't work, DO NOT INSTALL, ONLY BUY THEM IF YOU ARE MAKING OFFICE CHAIRS. By the way I might sell one or both of the office chairs if the price is right.