Its not that I don't believe it's possible. I think anyone with basic skills, a double bevel file, drill/punch/dremel and knowledge easily obtained on this site can obtain these results on some saws. I'm just skeptical of the claims by the OP that it's some special formula or whatever you want to call it.
A chain is no big deal, gonna need to be resharpened at some point anyway. However, I'd never buy something like a muffler mod without first seeing an example of the product. OP is just saying "trust me" with no credentials.
Sounds like snake oil to me. Show me or S.T.F.U...