2001 E46 330ci 6 branch exhaust manifold

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  1. 2001 E46 330ci 6 branch exhaust manifold 
    #1
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    Hi I am trying to find out some info on fitting a new 6 branch exhaust manifold. I fully understand this will decat the car but what I am concerned with is wether or not I will get an eml light on because of low cat efficency or if there is any way around this any help would be greatly appreciated Thanks.
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    328mark's Car Details
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    moved into here for you...more likely to get a response in here
    what i've felt,what i've known
    never shined through in what i've shown.

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    PLEASE READ THE POSTING RULES & HOW TO CORRECT THREAD TITLES & THE SELLING RULES
     
     

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    Cant remember if yours runs before and after lambda sensors, if running only before sensor be ok. Why not use 100 cell cat then be fine, and will pass mot decat will not.
     
     

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    2001 was just at the time that OBD2 became operational, and that requires the main lambdas for mix control, and a further set for cat monitoring.
    If the second set are fitted, they will notice the cats aren't there.
     
     

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    You'll struggle to source an off the shelf manifold unfortunately mate as all the well known tunning companies only cater for left hand drive cars

    I looked into this a while ago and the only options i really came up with are to have one made up custom or get a Supersprint one which would set you back about 2k
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  8. 2001 E46 330ci 6 branch exhaust manifold 
    #6
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    Quote Originally Posted by 328mark
    moved into here for you...more likely to get a response in here
    Thanks for doing that

    I've done some investigation into this my self and have found a company that reckons ther manifold fits straight on here is a link
    http://turborevs.org.uk/vmchk/stainless-steel-manifolds/bmw-e46-325i-330i-z3-z4-00-04-stainless-steel-header.html
    but I have allso looked at ones from the states and spoke to some one in th us who told me that they will fit a right hand drive but u have to be prepared to put about a half inch dent into one of the pipes to clear the steering column witch I don't mind doing if the manifold is cheap enough but it's the secondary 02 sensor I am worried about because I understand it may put a eml light on but I woundred if it would effect performance i also woundered if the system could be remaped so the second 02 sensor didnt work I should also state I am a vehicle technition and mot tester so I know all the regulations
     
     

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    The pic shown isn't your manifold, you'll have 4 bolt square flanges. The one in the pic looks more like an E46 M3 version.

    For a lot of these manifolds, they tend to be an exact copy of the original design, but shiny and they won't make a difference.

    In your case, it'll take out the primary cats, so there could be an increase to be had.
    The secondary lambdas / cat monitoring can usually be mapped out, but quite a few people in the US have found a lambda stand off, of about an inch is enough to fool the system.
     
     

  10. 2001 E46 330ci 6 branch exhaust manifold 
    #8
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    Quote Originally Posted by TheEnd
    The pic shown isn't your manifold, you'll have 4 bolt square flanges. The one in the pic looks more like an E46 M3 version.

    For a lot of these manifolds, they tend to be an exact copy of the original design, but shiny and they won't make a difference.

    In your case, it'll take out the primary cats, so there could be an increase to be had.
    The secondary lambdas / cat monitoring can usually be mapped out, but quite a few people in the US have found a lambda stand off, of about an inch is enough to fool the system.
    That's great the exact info I required thanks for your help.
     
     

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    have you had any joy with this manifold yet as im keen on doing the same to my 1999 323
     
     

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