WARNING FOR BUYING CATTED DOWNPIPES!!! - Page 4
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This is a discussion on WARNING FOR BUYING CATTED DOWNPIPES!!! within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Originally Posted by zax this surprises you? replacing the factory downpipe with an aftermarket pipe breaks federal statutes (in short ...

  1. #46
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    Quote Originally Posted by zax View Post
    this surprises you? replacing the factory downpipe with an aftermarket pipe breaks federal statutes (in short -- your car isn't street legal)
    Then we have no way to pass the inspection, right? no matter what the output shows.

    How about aftermarket catback?

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  3. #47
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    Quote Originally Posted by sheltonmega View Post
    Then we have no way to pass the inspection, right? no matter what the output shows.

    How about aftermarket catback?
    Technically, you are right. A catback exaust does not replace any OEM emissions devices, so it is street legal (unless there are noise-level statutes in your region, in which case it depends on the exhaust)
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    Quote Originally Posted by sheltonmega View Post
    Then we have no way to pass the inspection, right? no matter what the output shows.

    How about aftermarket catback?
    inspections here are once every two years. takes me under 30 minutes to pull a DP and put in back on. so put the stock one on, get looked at, take it back off. hour or two of your saturday gone and then your good for two years, whys this hard?

  5. #49
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    Kevin, you're full of crap.

    My STi passed emissions just fine the first time around with one cat (Cobb catted DP). After I let it sit for a while and had to renew it, it failed miserably. I attribute that to letting it sit for a while.

    Seriously, I'm not sure why I passed just fine the first time and failed miserably the second time around.
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    Quote Originally Posted by sheltonmega View Post
    Then we have no way to pass the inspection, right? no matter what the output shows.

    How about aftermarket catback?
    Catback doesn't matter.. those portions of the exhaust control sound/routing.. they dont have any influence on emissions.
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    So does this apply for all 08's and UP? and it would be just better to go catless then yeah?

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    Quote Originally Posted by krntehknik303 View Post
    So does this apply for all 08's and UP? and it would be just better to go catless then yeah?
    this applies to any subaru wrx / sti
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  9. #53
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    Quote Originally Posted by Sinister View Post
    this applies to any subaru wrx / sti, impreza, impreza L, justy, leone, geo prizm

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    ^^ Not necessarily... Any turbo subaru has high EGTs... but NA blocks do not. For some reason the 2006/07 2.5 Imprezas do have high NOx... but only in cold weather. There was something up at the testing station regarding the 2.5 Impreza from 06/07
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    Actually, I don't understand the question at all; I'm surprised you did Kevin...
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  12. #56
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    Hate to throw more fuel on the fire but I passed a few months ago in CT. Catless DP with a cat in my midpipe.

    Don't remember if we have a visual, but it doesn't look stock. I have the print out where I passed everyhting with flying colors. AP stage zwei.
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  13. #57
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    What brand downpipe? What was your NOx reading? What is the NOx limit? What type of testing do they do? Idle? Drive? Dyno? Static? Accel/decel?
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    Quote Originally Posted by spnkdrm View Post
    Hate to throw more fuel on the fire but I passed a few months ago in CT. Catless DP with a cat in my midpipe.

    Don't remember if we have a visual, but it doesn't look stock. I have the print out where I passed everyhting with flying colors. AP stage zwei.
    Thats not a cat its a resonator for sound.

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    Quote Originally Posted by synolimit View Post
    Thats not a cat its a resonator for sound.
    Hate to break it to you, but it is a cat. Looked at it myself during install. BPM turbo back.

    From my inspection sheet I have "Visual Inspection Results Catalyst: Pass" and "Emission Test Results Test Type: ODB II RPM: 1118"

    No numbers for different levels of things.
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  16. #60
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    Quote Originally Posted by spnkdrm View Post
    Hate to break it to you, but it is a cat. Looked at it myself during install. BPM turbo back.

    From my inspection sheet I have "Visual Inspection Results Catalyst: Pass" and "Emission Test Results Test Type: ODB II RPM: 1118"

    No numbers for different levels of things.
    BPMs do have a cat and a resonator in the midpipe. So I believe you.

    As for your inspection... if you were tested at 1118, that means it was probably an idle test. So you're lucky. You don't live in a state that does advanced smog testing.
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