Originally Posted by BBPeik
I have not heard anything like this. Any chance you are just hearing something from the exhaust now that you have the metal skid plate?
I'm not sure. I need to do a little more investigation to see if either the skid plate or the new header might somehow be causing it since I don't recall the noise before and those are the only things that have changed recently. I might try to get a recording of it too if the sound can be clearly heard.
It's probably nothing but given my recent issues in the timing belt area, I'm probably hyper-sensitive.