Sound of two metal pieces clapping against each other when...
 

I go over a pothole or a bump. It sounds as though two solid metal pieces came slightly lose and are bouncign up and down when I hit a bump. Small bumps don't initiate the sound. It sounds like it's coming from my left front wheel or right below me. The only thing I've done recently is brake pad change. I thouhgt it might me coming from my exhaust system (APR), but everything seems to be on tight. Any clue?

Re: Sound of two metal pieces clapping against each other when...
 

what year is the car?is the splash sheild secured?need more info

2001 A4 1.8TQM. The splash shield felt secure....
 

Just to give little more info... I replaced the front pads 4 weeks ago (Porterfield R4S... they are fat... had them on for a week and took 3 sessions before the pads wore down enough that entire area of the pad was making contact with the rotor... I'm still getting much more brake dust from the rear than the front... ???). 3 weeks ago, I was at NHIS attending QClub Driving school. It rained heavily on the second day. Going through the S curves on top of the hill, I felt/heard a noise. It sounded as though I went through a huge puddle and the exhaust hit somehting underneath (there was no puddle... it just sounded like it... I didn't even hit a bump). That's it. I'm lost. May be I'm overly paranoid? Could my bushing have deteriorate this quickly? The car only has 19k miles on it. I'm not very knowlegeable about this kind of stuff. Thank!