Flex pipe length?

Anyone know the flex pipe length on a 92 prelude? the choices are 2.25 " x 6" mesh length and 2.25" x 8" mesh length.

or would this take the place of it? http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33631&item=2452533657

a local muffler shop wants $120 for a stock one

mine has a huge hole in the side of the flex pipe

any ideas would be welcome

i am buying a cat back exhaust and performance cat but i need to replace the front part also.