Now, it‘s a little bit difficult about my English.

You‘re German, so the German regulations are working. It‘s a little bit like pregnant. You are or you are not.
There is no way between.

In some areas there are policecars against antisocial driving. This cars are equipped with the possibilities to have a look at the full spec of your car. Exactly how your full exhaustsytem must look. In every detail. I know it from a very high level.
Thinking about a damaged catalyst I ask the „man of knowledge“ for a switch over to something from the MX5 range.
Difficult. With an open eye it would be seen.

So in my eyes there are two points for the Germans: ask BASTUCK for a special made exhaust system. They are well known and there was a report in OLDTIMER PRAXIS for an MX5 exhaust.

Another nice and sure legal: VOLKSWAGEN had at some GOLF for better sound a simple trick. There was a fitting at the airbox for a tube running to the firewall with another connector. The breathing of the engine give some vibrations to the firewall and sounds.
So only inside the cabine a sound of a massive breath in.

But: as my British dealer told me… rev it. Up from 4000rpm the usual sound is not so bad.

And you‘re dealer sold you something bad, what is his answer?

Greets from Mainz

René

2018 plus4 (sports green)
with a homemade really shiny red tinted dash…