I just listened to your latest video on YouTube and the sound of your 575 is magical, I love it.
Out of curiosity, do you know whether your complete installation or parts of your installation (cats, double-H pipes, sport mufflers, etc...) will affect emissions? The reason I ask is because since my 2002 575 is now 14 years old, here in Canada we are forced every few years to get our cars tested for emissions to ensure that they are below a certain threshold, otherwise we cannot maintain our road registration for the car. I had to do this last year and will have to do it again next year. One of the reasons I decided in the end not to do a planned ECU upgrade for my car is because I was warned it would affect the emissions, and I was worried that though I would gain higher performance for a time I would then not be able to continue register my car for the road.
The big emissions quantity are at the cold start engine phase, for this reason there is the secondary air injection and the precats are very close to the head, when the engine is at temperature emission go down drastically...
In europe 575 is EURO 3 homologation, probably my car in a homologation test is not EURO 3, but perhaps yes because my big metallic 200 cps CAT is next generation in comparison to the CAT installed in original ....
In the following four pictures of the emission of the four group of cylinders measured by my dealer.
Remember that I NOT modified my ECU, engine run with original AR ratio ....
My complete system is basically composed from three parts:
1) 6-1 header system
2) center section double H-pipes
3) back mufflers with bypass
All of those three parts are installable independent or contemporary and are able to fit with the original parts.