Like the title says, I've been hearing this rattle sounding like it was coming from the head of the engine for a little while. Took the exhaust off and found the inner pipe completely separated from the outer on both sides right at the header end. Anyone have any luck trying to weld the two back together? Seems too tight to stick a mig gun in or even a stick for that matter. If not does anyone have any recommendations for an aftermarket kit? The oem exhaust is $500 for the two sides...