What do you recommend for a Quieter Pilot.
I realize that it may impact performance, but in this case quieter is worth the power loss.

Monkeywrench

Just went through the exhaust stage of my Pilot and found that the factory exhaust is still available from Honda. I don't remember exactly how much $$ but remember it was pricy. I recently put a FMF Turbine core 2 universal silencer/sparkarrester on my existing torque pipe with no cutting or welding. Alot quieter, compared to the shorty that was on it,but still pretty loud when I get it wound up. What kind of pipe do you have now? I'm not sure but I think any aftermarket expansion chamber made for performance is gonna be hard to get quiet. If you want a utility vehicle quietness, the closest you will probably get is the stock pipe/silencer from Honda.

The FMF Q2 silencer on the after market pipe is quieter than the super silencer
or quiet silencer.

Do a search for FMF there is much written on the FMF here are some returns
http://pilotodyssey.com/fmf1.htm