i just noticed this crap on the bottom of my megan racing catback....its weird its like little dried up bubbles and like someone smeared toothpaste all over the bottom of this section....here are some pics...

 

eww nasty..looks like a bug took a dump on the hanger and then layed eggs

 

ewww looks like exhaust pimples or something. lol

 

any ideas what the hell that is???? lol

 

You might have ran over something and it hit the hot exhaust pipe and stuck to it

 

Exactly. I bet anything you ran over a plastic bag of some sort.. and the heat melted the plastic to your exhaust. This has happened to me on my stock exhaust.. it looks really weird but is of no harm.

 

ya but it doesnt scrape on anything except speed bumps if you go fast....and i only did that once....and i would have noticed it when i put my pulley on...so i dunno

 

It doesnt have to scrape anything. like B_Real said it was probably a plastic grocery bag that you ran over and it blew up onto your exhaust and melted. It could have been Styrofoam. Just because you dont scrape doesnt mean stuff wont bounce up into it.

 

Yeah i have my money on a plastic grocery bag flew up under it, maybe on the freeway and melted onto it a litttle. I run paper and trash like that on the freeways all the time.
I'm sure it can be scraped off if you're really worried about it. Get an sos pad and lightly brush it off.

 

it's melted something.. very likely it was a plastic bag... and then the melted goo caused dirt and stuff to stick to it.

 

the exhaust has herpes... Get it some Valtrex!!!

 

or some herpex. http://www.youtube.com/watch?v=wrVqD67zils

 

That looks disgusting LOL. But i agree, it looks like a plastic bag melted on it.

 

it's a plastic grocery bag on the road that got caught under the car and melted. thank you very much

 

yep its a bag

 

I found the same thing on my 70Tempest exhaust once......looked just like that .....it is bag Herpes.

 

yup plastic bag.. oh and yeah.. you may wanna scrape it off. i left mine on.. everytime i drove around it would smell like burning plastic n make me think i was burning something else.

 

yep, as everyone is saying most likey a grocery bag that got attached to your pipe. this happened to me before.

i just let the plastic bag burn itself out - took about 2-3 weeks for it to completely burn off.

do you smell a "burning plastic" smell when you get out off your car after driving around for a bit?