The sound he is looking for will not be attainable. Ferrari's sound the way they do due to their small displacement but high number of cylinders - i.e. each cylinder is small so the note from each cylinder exhausting is a higher pitch than say a LS2 cylinder.
The Borla kit is TOO F'EN SMALL FOR A 3L PEOPLE - GET THAT THROUGH YOUR THICK HEADS! It's no different in size to the stock SVT exhaust so in my eyes - waste of money. Sure it sounds better than stock, but almost any exhaust does!
Demon's theory on the Dynomax being less boomy may be true - although I'm not sure how. Running two AS BIG AS YOU CAN FIT Dynomax Ultraflows at the back - along with te Mag res he has will sharpen the tone - but it won't sound like a ferrari - you need another 2 cylinder for that.
