Nope, not the animal kind, the converter kind. I went out playing in the snow this Sunday before the "big game" and on the way back I had issues with my truck. It lost power and started making a whistling sound. I think the pictures will tell the story. That is a chunk of my cat inside the pipe between the cat and the muffler. Nice restriction. The whistling sound was coming from a gap at the header flange. The back-pressure blew out the gasket and created a leak.
That is a pic of me churning up the white stuff.
That is a pic of me churning up the white stuff.