hi all driving car today and gave it some beans not to harsh took it to 5000rpm roughly in 3rd... when i changed gear i heard a quiet bang so wound window down and did it again then changed to forth gear it did same but when i tried to do it after that didnt seem to make any noise??? sorry if this sounds retarded and stupid but i wondered can a standard exhaust backfire? if not what could it be? cheers in advance ryan.

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