I will be installing a 2000 Civic Si rear sway bar on my 1997 Civic EX. In the diagram above, part 30 connects to the subframe with part 35. On a Civic Si, there is a built-in nut on the back of each hole on the subframe, where part 35 screws in. On my Civic, there are no built-in nuts there. So, in order to secure part 30 to the subframe of my car, I must use four 8 mm nuts. I do not know which nuts to use, the flange nuts or the self-lock nuts. I also do not understand the use of parts 33 and 34 in the diagram. Why can't you use part 33, instead of part 34, and vice versa?