Oem exhaust manifold - Lexus IS Forum
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post #1 of 9 (permalink) Old 03-24-2019, 06:34 PM Thread Starter
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Oem exhaust manifold

I have an 02 is. Is it required to have a cat specifically from an 02 to pass smog or can I get one from a 01,03,04-05?
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post #2 of 9 (permalink) Old 03-24-2019, 06:40 PM
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I have an 02 is. Is it required to have a cat specifically from an 02 to pass smog or can I get one from a 01,03,04-05?
01 to 05 are all the same.
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post #3 of 9 (permalink) Old 03-29-2019, 05:48 AM Thread Starter
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So I was able to find a used oem manifold. So if I install it should pass smog as long as the cats are functioning? For context I failed smog because it had a aftermarket cat and that's how I bought the car 5 years ago. I don't want to go through the trouble and still have it fail so I want to know if for sure it will pass this time.
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post #4 of 9 (permalink) Old 03-29-2019, 09:24 AM
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In my state, if the CEL light is off and the inspection station computer can talk to the ECU, you pass emissions.

You can't know it'll pass till you drive it awhile. If the light doesn't come on after a week of driving, you're probably OK.
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post #5 of 9 (permalink) Old 03-29-2019, 10:09 AM
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So I was able to find a used oem manifold. So if I install it should pass smog as long as the cats are functioning? For context I failed smog because it had a aftermarket cat and that's how I bought the car 5 years ago. I don't want to go through the trouble and still have it fail so I want to know if for sure it will pass this time.
Why was it failing? Sniffer or code; what?? Most aftermarket manifolds will pass as long as the engine and smog equipment is functioning right.
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post #6 of 9 (permalink) Old 03-29-2019, 11:29 AM Thread Starter
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In in CA the eo number didn't match with what was allowed
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post #7 of 9 (permalink) Old 03-29-2019, 02:52 PM
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In in CA the eo number didn't match with what was allowed
California emissions is stricter than the other states. So aftermarket cat converter is probably not made for your state.
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post #8 of 9 (permalink) Old 03-29-2019, 06:21 PM Thread Starter
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California emissions is stricter than the other states. So aftermarket cat converter is probably not made for your state.
Yes that is why i got the used oem exhaust. When i get it installed, do you think the smog techs will care that its used or will they pass it as long as the cats and monitors are all ok.
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post #9 of 9 (permalink) Old 03-29-2019, 09:20 PM
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Unless it's bad too, how will they know?
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