Got the system on today. I rode home, 25kms/20 miles, with the db killer out.
Yes, it is pretty loud and you do loose a bit of bottom end.
I put the db killer back in and went for a shorter ride and that almost bought the bottom end back as it was before the change of the system.
I'm getting a Dyno next week so all should be sorted then.
I'm going for a 400km/300mile ride on Sunday, so it'll be intersting to see how things go on a faster ride.
It is nice not having that extra 6 kg hanging off the under side of the bike.
So far, I'm happy with the result, and my bike finally sounds a bit more like a Ducati.