IH, You might want to listen to the S&S SPO's. They're the quietest peformance mufflers I've found. You can listen to them on their website under "Featured Items". The look's aren't for everyone though. Check 'em out. Hoist! 8-)
Guys, I can tell you they don't sound
too quiet - they've got a real pleasant rumble that gets noticed but doesn't upset the citizens
They
are big though - Here a pic from S&S website
I've had them on for a couple of months now and I have gotten used to the look
As soon as I get my cams and oil pump installed (Mid-Jan I hope) I'll get the PCIII re-tuned with the dyno and we will see what we get - right now they are running fine but feel a little light on Tq low down - Top end feels slightly "free-er" than the V&H ovals that I took off.
Cheers
Dave