Well with a decat on its sstupid stupid loud. Yeh its brilliant when you want to go out for a blast but day to day a YS system and decat is a little OTT. There 95DB standard, would hate to think what they are with a decat!
Honestly mate, I think with the cat in its the perfect noise. Still really raspy but only loud when you got a heavy right foot. I can sit at 70mph on the motorway and not even know i have got a system on.
Drove 350 miles to newquay with it and my ears didn't hurt one bit. could hear the radio no prob!