Probably quieter than F.I. and about the same as Berk. That's just a guess from the video. It sounds raspy and like the pipe might be vibrating off something which is usually an easy fix. The rasp, I would recommend adding resonated test pipes, ART pipes, or resonated HFC's with that system.
Edit: Yeah, they were using test pipes with it. They will make damn near any exhaust raspy.
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Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI
New Car: Under Construction
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