> I'm sure there's an easier way, but what I do is actually take a tape
> and measure the muffler dimensions. I measure the circumference of the
> pipes at the connections and write it all down. Then simple arithmetic
> allows one to convert the numbers to diameter sizes, allowing for
> thinckness of the pipes of course. That way I know what I have on the
> vehicle I'm starting with and can check what's available to modify it.

>i was lookin to change my exhaust on my 99 crown vic.  i was wondering
> what size the pipes are stock? and what size the inlet and outlet of
> muffler should be if i keep the stock pipes. and what the length of
> the muffler its self should be? thanks in advance