not quite sure....
i have noticed recently that after i start my truck up, debris (it appears to be either my stock exhaust or my exhaust manifold) shells off onto the ground. i have tried to diagnose what is going on but i'm clueless. my downpipe doesn't appear to be rotting out (even though my stock exhaust is in bends), and i cannot tell if it is my manifold but every time i start my truck shelled off exhaust falls on the ground (or that's what i'm guessing it is). what do you guys think?, do i have something to worry about? maybe get new exhaust or manifold?