Here's a video of my pipe changes. The video steps through the stock pipes, the stock pipes without the catalytic converter and finally the beautiful sound of the v-twin and fullsac 1 3/4" baffles. You need good speakers to listen to this, but it's night and day difference from stock.
Here's my Radio Shack sound meter details:
Idle with cat: 93db - w/o cat: 96db - w/fullsac baffles: 100db
2K RPM with cat: 102db - w/o cat: 100db - w/fullsac baffles: 103db
3K RPM with cat: 96db - w/o cat: 101db - w/fullsac baffles: 107db
4K RPM with cat: 104db - w/o cat: 105db - w/fullsac baffles: 110db
5K RPM with cat: 102db - w/o cat: 106db - w/fullsac baffles: 109db
The pipes now have a lot more base, but the volume is not intrusive at all. I can still hear the radio and it doesn't set off car alarms when I drive by. I'm going to Dyno next week. We'll soon see what difference the pipe changes have actually made.