Last Saturday night/early Sunday morning, I was taking some of my friends home. I heard this weird vibrating sound. Then yesterday I pulled on it a little bit, it didn't help. So tonight (yes I work at night), when I was going to the ATM I noticed the exhaust tip was missing. I don't know what the deal was. It might've happened a few months ago when I backed into a wooden step by mistake. But I doubt that was the case.

 

I am not a mechanic, but I think the next step to fix your problem is to replace the tip

 

Well I could get welded on again, or just get a better quality exhaust. I would've thought DC would have been a lot better than this.

 

it's possible the noise is an oem heat shield of some sort. they sometimes corrode loose and rattle, and are very annoying. you may notice the noise only at certain times and then at others it goes away.. it all has to do with the frequency at which it's vibrating