need help figuring out whats making noise...

[black34v6]

ok. car rattles...really badly. ill see if i can make a video on the way home so you can listen to it. but basically, from inside the car sounds like its coming from the y-pipe->cat area, outside the car it sounds like its coming from the back...

anyway, about a coupla weeks ago i bottomed the car out doing 80mph on a pothole (chicago pothole in CA)

anyone got any ideas? the nuts/retainers on the exhaust are all snug.. the header bolts are snug... cant think of anything else...

-R

[Guardiannknight]

Could be your heat shields. Check out some of the post in the intake/exhaust area.

[Houston F-Body]

I had the same problem with a loud rattle - turned out to be my exhaust - I know you said its tight I thought mine was too - had them weld insted of using brackets and it went away.

[Colin]

I can all but guarantee you it's the heat shield under the passenger floorboard. I did the same exact thing goin' like 2 mph through a post office drive through. We'd just had like 8" of snow and so there was a large patch of packed ice and I just rolled right over it, but my car sits so low that it nailed the cat and shield and I immediately knew what it was, so I took it to a muffler shop here and had them weld it back for like $10. It's an easy fix.