Corksport test pipe + mazdaspeed exhaust?

[jflash]

I want to order the corksport test pipe but I'm not sure which size to get. 65 or 80mm? I have the aftermarket mazdaspeed exhaust and stock downpipe. I know the 65 will probably work but if the 80 will bolt up to my exhaust I would rather have that one.

I did send them an email Thursday but haven't heard back yet.