986 Forum - The Community for Porsche Boxster & Cayman Owners - Additives? Searching for some info for my Audi

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urban_legend

11-29-2010 04:41 PM

Additives? Searching for some info for my Audi

and I came across an additive (Cataclean) that is supposed to clean your catalytic converters to get rid of the dreaded bad cat code 0421.

And I wondered if anyone used any additives that they worked or were worth the price. I have seen good reviews for Techron and Tufoil but have never used them.

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