Take your circumference measurement and divide by pi, 3.1416, to acheive
your diameter.
Example, if your circumference is 6.29", divided by pi, you have a 2" pipe.
"reetrulez" <UseLinkToEmail@www.autoforumz.com> wrote in message
news:721880_6bf908d58292e2c16f8475da060ad2b2@autoforumz.com...
>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
>
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