I will try and make a sound clip tomorrow, and will post it here when i have it ready. Its not super loud because the cats are still in place, and the stock pipe does not allow for much echo. You will probably have a little popping (which is unavoidable with glasspacks) but by getting a longer one, you can minimize that. However the longer it is, the quieter it will be. Also, they don't start off sounding spectacular, but once they are broken in, which takes about 3 months, they sound a lot more like just straight pipe exhaust, except they are a legal muffler in most states. I don't know if DC does emissions testing? If so keep the old muffler and just swap that back in when it comes time...
I had to completely refab my tailpipe behind the glasspack because the glasspack was a little shorter than the muffler, and so it sat too close to the rear tire and bounced off of the axle. After about 6 trips to O-Reilly's to buy the right pipe fittings, i got it all to work, otherwise if you really want it loud, just drop a turndown at the end of the g-pack and dump the exhaust! That's what I should have done from the start. I will get pics and post them tomorrow.