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Thread: Anyone cut out the resonators on 840?

  1. #1
    Join Date
    Nov 2006
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    Memphis TN
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    95 840,14 535i

    Anyone cut out the resonators on 840?

    I have magnaflow exhaust, and was thinking of cutting out the resonator and go to straight pipe with just the mufflers on 95 840.. Would like a better sound. Have seen other BMW's have it done. Anyone tried it yet?

  2. #2
    Join Date
    Dec 2007
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    Dallas, TX
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    '93 850Ci- Daily Driver
    Don't do it. Had an 840 here a couple of years ago with center resonator cut out - talk about obnoxious cabin drone.
    '93 850Ci - Mineralweiß Metallic

    2001 740iL - Titansilber
    ALPINA B7 -Alpinweiß III


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  3. #3
    Join Date
    Nov 2004
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    Orange County, CA
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    840Ci|725tds|Alpina B7
    Quote Originally Posted by barry8108 View Post
    I have magnaflow exhaust, and was thinking of cutting out the resonator and go to straight pipe with just the mufflers on 95 840.. Would like a better sound. Have seen other BMW's have it done. Anyone tried it yet?

    I did it.



    ...and un-did it.

  4. #4
    Join Date
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    99 840ci Sport Indv
    I did it too - and wished I hadn't!
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  5. #5
    Join Date
    Nov 2004
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    Orange County, CA
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    13,503
    My Cars
    840Ci|725tds|Alpina B7
    The resultant sound is more "loud motorboat" than "tuned BMW" - very obnoxious, plus the droning and popping...

  6. #6
    Join Date
    Jan 2013
    Location
    Toronto, Canada
    Posts
    406
    My Cars
    2009 Porsche 911
    I replaced mine a few years ago with MagnaFlow. This is what they look like

    Resonators.JPG

    There isn't any drone at all.

    Cheers!
    2016 Macan Turbo
    2009 Porsche 911 Carerra S (997.2)
    2013 BMW 135i Convertible

  7. #7
    Join Date
    May 2007
    Location
    Fayetteville, GA, United
    Posts
    409
    My Cars
    '95 840Ci/6, F36, E89
    Replaced mine with an x-pipe running to Magnaflow mufflers. I'm not sure what "droning" sounds like, but I don't notice much of a difference from before.

  8. #8
    Join Date
    Jun 2009
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    San Jose CA
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    676
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    1991 850i S70 6 speed
    Quote Originally Posted by TxGR8White View Post
    Don't do it. Had an 840 here a couple of years ago with center resonator cut out - talk about obnoxious cabin drone.
    I second that. It sounds great but major drone, where I am thinking putting mine back in.

  9. #9
    Join Date
    Jun 2009
    Location
    San Jose CA
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    676
    My Cars
    1991 850i S70 6 speed
    I found a set of used Resonators that I would like to put back on my car. I can't recall what it looks like or where it needed to be placed. Does anyone have picture of the placement of the resonators?

    Thanks
    Alex

  10. #10
    Join Date
    Jan 2013
    Location
    Toronto, Canada
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    406
    My Cars
    2009 Porsche 911
    Quote Originally Posted by alex840 View Post
    I found a set of used Resonators that I would like to put back on my car. I can't recall what it looks like or where it needed to be placed. Does anyone have picture of the placement of the resonators?

    Thanks
    Alex
    You can see the stock location from my pic above ^^^^

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