[french_connection]

well I would be lying to you saying that a 4 in 1 long tube will be quiet, but you always have the option to buy a good magnaflow quiet silencer and run another one down at the back.

it will make you gain a lot of top end, which mean complet sense to me since you have a supercharger, I would say you should weld in order after the flex pipe: high flow cat hermoff for a 5.9 liter un on the line maybe 2 feet after the flange, good silencer on stock location, mufler at the tail pipe,

then you'll probably have a very sweet exaust sound that wont piss off the neighboor unless you rev it up.

:)