The Borla dual catback system is another good choice, I've had one on my '7 since 2001 and it still looks & performs like it was brand new. The Borla is all SS construction (as in everything, not just the mufflers), and very similar in design to the Racing Beat dual catback. Sounds a lot like the RB system too - it's a little louder than the RB at idle & WOT, but it's a mellow deep tone. Long road trips won't torture you. Cost back then was in the $400~475 range.
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