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Originally Posted by blinkwatt
Running RoW spec DME will not read from the 2nd o2 sensors,so you can remove the 2nd set of cats without a CEL light.
You should still pass smog....I was going to do this to my 01' S cause the 2ndary air injection used on cold starts went out and I wasn't gonna pay $1k to replace it when it really does nothing.
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I would really like to run a nice set of headers and a catless exhaust...
Deleting the secondary cats is a given . He's asking whether or not it's prudent to go completely catless .