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Discussion Starter #1

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2 way cats deal with carbon monoxide and hydrocarbons or volatile organic compounds (VOCs).

3 way cats deal with carbon monoxide, hydrocarbons or volatile organic compounds (VOCs) and NOx molecules.
 

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Get the 3-way. It will cut down on NOX emissions and it won't hurt anything else.

The 2-way or 3 way only refers to the gases that it converts. Basically a 3 way cat has 2 seperate catalysts inside it. First the gases pass over one that is identical to the 2 way cat, then they pass over another that reduces NOX.

Mike
 

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In short...

...3-ways are better than two ways...

;)
 
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