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11-12-2015, 02:35 PM
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Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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Secondary cat delete
Hey guys,
I'm getting a custom exhaust installed early next week. The guy doing the work (trusted and knowledgeable) recommended a secondary cat and resonator delete with 2.5" piping and an aftermarket exhaust. He stated I won't lose low end torue but will increase top end HP due to my other mods (intake header etc). He also stated that my CEL wouldn't get triggered because the O2 sensor only reads after the first cat so the second one has no effect on a CEL being triggered. Can someone please chime in on this. I don't want to go through the work and then have to re install my second cat due to a CEL. If the CEL will get triggered then I'll just do a resonator delete instead. Thanks
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