Need test pipe for 3" exhaust

[ProCharlie]

Does anyone know where I could get a test pipe, to take the place of a catalytic converter, that has the 4-bolt flange on the outlet to connect to a 3" SS exhaust? It is for an '87 TType, and I have a 2.5" downpipe now; I could adapt it to a 3" test pipe, until I get a 3" downpipe. There is 18" between the end of the downpipe and the flange on the exhaust pipe, so I think there is enough room to add a 2.5" to 3" adapter.

[Spool'n Fool]

I've seen them on Ebay.. available in 3" per the ad

http://cgi.ebay.com/ebaymotors/BUICK-GRAND-NATIONAL-TEST-PIPE-W-DUMP-TUBE_W0QQcmdZViewItemQQcategoryZ33633QQitemZ804355 7142QQrdZ1QQsspagenameZWDVW

[Survivor87]

I have the straight 3" test pipe from this vendor (no dump tube). It is 19 3/4" long overall. It is also swelled on the non-flanged end so that a 3" pipe can slip inside it almost 2". Maybe this will help you decide whether it will work for you or not.
Steve