They are pretty common, generalyl sold as a utility rather than "master cut or some such, same thing different spin on advertising.
Is the new muffler genuine? chances are there is packing in there but its well pressed in out of sight.
Ive found mostly on product review sites, the ones giving one or two stars are yuppies, having a whinge that either do not follow the instructions, or peed off because they had to get warranty work done. Either way victas quality has slipped down and down over the last decade but I have older variants of the "master cut 460" that are 20+ years old and still run like a clock.
