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LX to EX Headers Legal Question

Discussion in 'Tech Archive (No Posting)' started by jdrames, Oct 2, 2008.



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  1. jdrames

    jdrames New Member 5+ Year Member

    Joined:
    Sep 30, 2008
    Messages:
    11
    Location:
    Maryland, USA
    I am doing a Headers/Exhaust swap on my 01 Civic LX so that it can run EX exhaust.
    Backstory is pretty much that I took my car to the shop for an SRS light issue and while there they informed me that there was a Crack in the exhaust manifold. For them to fix it, it was going to cost $1700.

    After a little research I found out for around $500 I could do a full exhaust swap from Headers to Catback exhaust. My question though is: would the car remain street legal with the following things installed/modifications.

    Megan Headers 4-1 > Random Tech B-Pipe with Cat-Converter > EX catback exhaust
    (o2 Sensors extended for changes of Cat-Converter locations)

    The idea with that setup was that being that on the LX the exhaust manifold had the cat-converter in it, and I cant take that out and remain street legal/pass emissions testing in Maryland. So I was simply moving the Cat-Converter to the B-pipe and going to extend the o2 sensors as needed. My concern though is that the Megan Headers aren't listed as street legal. But I can not see how these would have a change on the emissions. I'd understand if I just replaced the manifold with the headers and didn't have a cat-converter and ran test pipes. But thats not the case.

    I'm not looking for performance boosts really. I just want the car to be fixed and not pay huge amounts of overhead from the dealership. I also figured if I could I might as well replace some of the rusted out parts so I went with the idea of a full exhaust replacement.
     
  2. oddeb707

    oddeb707 R.I.P Stephen Jackson Registered VIP Registered OG 5+ Year Member

    Joined:
    Jul 21, 2007
    Messages:
    7,021
    Location:
    nor*cal
    megan headers do not smog in CA

    idk about PA
     
  3. Unuzual Kustum

    Unuzual Kustum 4DR Sleeper Registered VIP 5+ Year Member

    Joined:
    Dec 24, 2007
    Messages:
    452
    Location:
    Hedgesville, West Virginia

    This isn't Brad is it? Either way..... It won't change emissions as long as you get the extensions for your 02 sensors.
     
  4. Unuzual Kustum

    Unuzual Kustum 4DR Sleeper Registered VIP 5+ Year Member

    Joined:
    Dec 24, 2007
    Messages:
    452
    Location:
    Hedgesville, West Virginia
    Here's a link to a website. They have multiple lengths of 02sensor extensions.

    http://www.casperselectronics.com

    Just click on the link and there is a SEARCH button. Click it and type in Honda into the search box. It will come up Honda 02 extensions. $25 a piece and you can flip them to suit you 02 plug being male or female. Hope this helps.
     
  5. DarkCreep

    DarkCreep D16Y8+T Registered VIP Registered OG 5+ Year Member

    Joined:
    Jun 26, 2007
    Messages:
    6,597
    Location:
    Pomona, CA
    $1700 to fix a exhaust manifold leak when a newer better one costs $50?
    Wow, im pretty sure theyved raped a lot of people.

    I need to do the EX cat mod too, but I want an actual EX cat, not aftermarket.
     
  6. jdrames

    jdrames New Member 5+ Year Member

    Joined:
    Sep 30, 2008
    Messages:
    11
    Location:
    Maryland, USA
    I'm not so much worried about it failing emissions as much as it failing a saftey inspection.
     
  7. Tkdtim1226

    Tkdtim1226 New Member 5+ Year Member

    Joined:
    Oct 18, 2007
    Messages:
    221
    Location:
    Maryland
    I live in maryland as well. The last time I had my emissions tested, all they did was plug in something under the dash, not test what was actually coming out of the tail pipe. I am no expert on how this works but I was told that pretty much, as long as your car is not throwing a code, you will pass emissions. Can anybody confirm or deny this.

    Now, I need to have my emissions tested within the next month. If you want, I will let you know how it turns out. I can ask them when I'm up there, if they feel like talking about it.
     
  8. Unuzual Kustum

    Unuzual Kustum 4DR Sleeper Registered VIP 5+ Year Member

    Joined:
    Dec 24, 2007
    Messages:
    452
    Location:
    Hedgesville, West Virginia


    They plug into your OBD port to see if any codes are stored in you car or to see if a CEL is on. That way you can't just pull the bulb for the CEL and think you're getting away with it. They should check the exhaust at the tailpipe unless they've come up with a different way to figure out how much exhaust gas is being emitted......
     
  9. guerra

    guerra New Member 5+ Year Member

    Joined:
    Sep 25, 2007
    Messages:
    50
    Location:
    NY
    These regulations are tricky, New york is probably the same as most other states. What I know 99% for sure is that if your good in Cali, your good in other states, they are the strictest.
     
  10. Tkdtim1226

    Tkdtim1226 New Member 5+ Year Member

    Joined:
    Oct 18, 2007
    Messages:
    221
    Location:
    Maryland
    So I got my emissions done. They checked my OBD for the CEL, as expected, and tested to see if my gas cap was pressurized. The guy told me unless I do something to modify my ECU, I won't fail my OBD test. Then again, this guy I talked to didn't sound like he had the greatest depth of knowledge. So go ahead guys, put on those stage 3 cam shafts and rock and roll. Just don't throw a CEL and you're fine.
     
  11. vjf915

    vjf915 New Member Registered VIP Registered OG 5+ Year Member

    Joined:
    Sep 1, 2007
    Messages:
    12,047
    Location:
    NJ
    You should be fine putting a Megan header on in Maryland, it basically has the same specs as the stock one :what:. Only DC is C.A.R.B. legal, but that only matters in Cali.
     


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