What the heck is this??

chryslerfat said

I would have to agree that this may be it. I know on diesels they started cayalyst mufflers back in the 90`s

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Would something this small really have much of an effect on emissions? I mean the total contents of the bag would fit in a good sized shot glass. NOX is usually the big issue with diesels. What kind of pellets would they use to reduce that?