Much to far away for you to come and take a spin. But I can tell you the Mistral aluminum oval can I run is not loud at all. I really like the sound without the db killer in, but unfortunately, the motor runs better with it in, so in it stays.
It is only slightly louder than stock with it in, with the emphasis on slightly. I also pull the crossover off, which on the Breva contains the cat, and replaced it with a free flow Mistral, all from MG Cycle.