In article >, says...

>The bolts between converter and center pipe (Pipe B) are actually
>separate, and are called "converter bolts". On my 94 Civic these are
>specialty bolts (not cheap, same for the 88 Accord) that have a thin,
>flat head and "ridged" spine designed to grip in the holes in the
>converter and help prevent the bolt from turning as you apply the nut.
>
>I tried to get mine out but found that the rust was more than I could
>handle with my equipment. Mechanic charged me $75 to do it. Maybe try
>heat and hammering them out with a punch from the Pipe B side? Just be
>careful not to pound so hard that you damage either the cat or Pipe A,
>both of which cost a lot. Might be better to drill them out.

Thanks for the tip. I tried pounding on the bolts with a hammer, not a big
one, and they bolts would not budge. I tried drilling them out, but my drill
bits were not up to the task. I'm going to buy a couple of decent bits before
I try again this weekend. Since I am going to drill them out, I'm not going to
bother with the special bolts.
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Alex