Aftermarket Catalytic Converter
#17
don't know how they will flow as compared to a random tech. cat, the metal cats have less of a catalyst inside them so they may not be as effecient which means no pass on emissions-i really do not know i was thinking of picking one up and seeing how it performs
#19
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I have the full Cargraphic stainless exhaust system on my S2. It includes a low restriction 100 cell racing type converter. My emissions were only slightly higher (and still quite low) when I ran it through this year. I think most cars would pass without a converter. My son's '89 951 did when he was running the cat bypass pipe.
#21
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Originally Posted by jturbo
How does the SFR swapable cat work with the "test pipe"? Can it be used with the stock exhaust system?
#23
Instructor
Join Date: Oct 2003
Location: Capitola, CA
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I have the SFR system and normally run the resonator, however I did buy the cat to use when needed. The cat did a good job when I went through emissions recently in CA. It is set up to slip over the three inch exhaust on one end and has a square flange on the other.
#25
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Join Date: Feb 2002
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I wonder if most 951s would pass without a cat. When they test emissions they are not going to be running in boost so that would probably help keep emissions low I would guess.