I have posted this before, but did not get many responses so here goes again. I am trying to remove the original muffler on a 89 Catalina 30 with the Universal M25XP. I have heard that some are screwed to a piece of wood that is glassed in place. My setup just seems to have the (4) screws and some sort of epoxy or other bonding material (hard as a rock) holding the muffler in place. I have removed 3 of 4 screws, of course one head is striped and I will have to drill it out. Again, with 3 of 4 screw removed this thing will not budge. I am going to remove the galley latter on in the week, but I do have faily good access right now. I know it is original to the boat. Anyone have any ideas?