The exhaust leak make the ticking noise underneath my car but does it also make your car sound like you have true dual exhast? I really can actually put some chrome tips on the back and fool some ppl. I even set some car alarms off and my radio isnt even on. Now for the rattling noise, I hear upon acceleration, is that the cat vibrating?

The cat heat shield, most likely.

I set off a car alarm yesterday with my exhaust note!! :P

THis is the rattle your refering to?

Yep. Mine fell off about a month ago. Need to get a new one.