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CA smog, turbo back hi flow cat, fail on sound or HC or both?
CA smog, turbo back hi flow cat, fail on sound or HC or both?
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Old 03-15-16, 07:21 PM   #1
christron
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Default CA smog, turbo back hi flow cat, fail on sound or HC or both?

Obviously a full turbo back exhaust fails visual inspection, if your tech bothers to look under the car, and a tune is required to stop the cel. But what about the actual tested measurements?

I read limit is 95db tested 20" from tailpipe. And of course there is the idle hydrocarbon and 3000rpm test. Will a cobb 3" turbo back exhaust with hi flow cat pass either test? I do not have the oem exhaust. I can think of a few different options for me but if this exhaust can pass the measurements maybe i can get lucky with a lazy visual inspector. Very curious on others' experiences.


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Old 03-15-16, 08:11 PM   #2
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Default Re: CA smog, turbo back hi flow cat, fail on sound or HC or both?

Curious to know this as well. My guess is that you'd pass the sniffer and the db test no problem. But they've been cracking down on smog stations these days and you're more likely than not going to fail the visual.
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