As per the title, the seam on my 2003 996 C2 o/s silencer box is corroded. It doesn't seem to be blowing but I have noticed other cars have had some sort of welding or other fix to the seam. Is this something that can be done DIY eg with Holts Gun Gum and bandage or similar, otherwise if the silencers need replacing what do others recommend? I don't want louder than original or any sort of switchable. I have heard conflicting views on Dansk so any other recommendations welcome and thanks in advance.