HELP:funny noise from exhaust before warm up

[DOCJHH45]

Hi all,

I got a 00 vert M6, all stock. I'm getting a loud noise (almost as if there's a hole in a muffler) from the exhaust whenever I clutch between gears, but it goes away once the car reaches normal operating temp.

Anyone have any ideas what this may be, or experience it as well???

I was thinking cats... but i'm not sure.

Thanks for all your help

[DOCJHH45]

bump...

[TransAm11973]

well first off where in the exhaust line is it coming from?? engine end or cat back end?

[Speed Psychosis]

are any exhaust parts bolted on instead of welded? Maybe when they are colder there is a hole and then when they warm up they expand to fill the hole.

[9t8z28]

There is probably some part of the exhaust loose. Your gonna have to get under it and find it.

[ArcticZ06]

i get some slight backfire rumbles before my car warms up when i switch between gears. Is that what you're hearing maybe?