I'm had my 407 for a few months now (live in Australia) and I want to do a few performance mods to it.

Just wondering if anyone else has done anything to theirs with positive reults?
i.e. Hi-flow Catalytic converter and better exhaust setup.


Also, does anyone know how much the peugeot is 'tuned down' to allow for emissions, bad fuel, bad maintenance , etc.
As my previous car, Volvo S40SE was tuned down 20% !
And does anyone know where I can get the software to tune it up?

Many thanks