Pop/miss on decel?

[cuisinartvette]

Heard about the decel/backfire thing on these cars..Supposedly Haibeck tunes stop (car has H. tune).

Never noticed this til I listened to this a few times as its a little "boomy" in the interior but you can hear it .

Does this sound typical or like more of a miss?

(Towards the end of the clip)

http://www.youtube.com/watch?v=iJiF6YLhYgE