Well as we only have the Abarth here in Australia I'm not sure there's much point.
The Record Monza doesn't have 2.5" piping, so no gain to be made there, and our mid pipe doesn't have a resonator to start with, so no gain there either.
A direct replacement for the OEM crushed cross over pipe would be nice though. If not Good-Win Racing then I'm sure someone like Supersprint will eventually come out with one.