I haven't really fully checked all that out yet, but I know that statically, the exhaust doesn't touch anything. I've laid under it with it running to feel for exhaust leaks in the welds, so I had my hands around the pipes with it running, but I wasn't looking for contact/rubbing anywhere.

I can check that again as well, but I'm pretty sure that it's coming from inside the engine somewhere.


**Photobucket sucks**