I,ve developed a rattle in my exhaust box probably due to the amount of pot holes up here.anyway thought I could cut the box open & see whats loose & weld it. is this doable, never looked inside a box so don,t know what I,ll find.
If the exhaust box rattles like a rattle, then there is already no glass wool. The fallen piece of a perforated tube thunders. Cut through the hole in the muffler body (exhaust box), take out the fallen off part and brew again no problem.