Dean (Red Barchetta) and I were terrorizing our local streets on Saturday, so I got a close-up and personal test from outside the car. Here are my unscientific observations:
1) The car no longer sounds like a small-block Ford, it now has it's own distinctive sound
2) Without a dB. meter, I would say that when he gets on it (which happens frequently) it would be the loudest street car I've heard life-to-date,
3) At idle to cruise it would fall into the "acceptable" range,
4) My wife likes the sound of his Cobra better than mine with a 496 FE with glass packs
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I've heard the car from inside and now outside and I think this setup is a winner.
Brian