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Thread: Free downpipes!

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    Free downpipes!

    Hey guys,

    In doing lots of 2step testing recently with our factory cats in place we've accidentally stumbled upon a free downpipes DIY... :happy :lol

    Click here to enlarge

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    wow it just melted the cats huh lol
    Burger Motorsports
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    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.

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    Someone explain to me what I'm seeing.

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    Awww, I thought Terry was giving away free downpipes.

    ^me too, what happened to those downpipes?
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Someone explain to me what I'm seeing.
    looks like a stock dowpipe with the cat eaten through lol
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.

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    Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
    looks like a stock dowpipe with the cat eaten through lol
    So the 2-step just heated it up and melted it?

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    good info terry, thanks. you should put a disclaimer (as should shiv) that the two-step should not be used with catalytic converters. thanks for finding out the hard way on an n54 Click here to enlarge
    Click here to enlarge
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    So the 2-step just heated it up and melted it?
    As fas as I know, thats what it looks like..
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.

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    Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
    As fas as I know, thats what it looks like..
    The two step limiter blew right through them!

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    Yessir! from the man himself ^^
    Burger Motorsports
    Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.

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    Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
    As fas as I know, thats what it looks like..
    Well then, for catless peeps it seems.

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    I've been testing this board with Terry. I have catless DPs but kept the catted midpipes, I'm pretty sure it is blowing through those as well as now there is a weird resonance that didn't happen before. I'm going to get them cut out this week and see if that fixes it.

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    Let me know what you find after inspecting them. I wasn't able to get a scope in to look em over so just shook the cat material out and bolted it back on for now. Tempted to just keep two stepping until they blow out all together saving the trouble of having to cut them out. But not sure if that will work that far back in the exhaust.

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    Click here to enlarge Originally Posted by doogle Click here to enlarge
    I've been testing this board with Terry. I have catless DPs but kept the catted midpipes, I'm pretty sure it is blowing through those as well as now there is a weird resonance that didn't happen before. I'm going to get them cut out this week and see if that fixes it.
    Let us know what you find. Surprised it is happening to the mids as well since they are so much further downstream.

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    Makes sense. That is what you get if you use the exhaust as a combustion chamber. The shockwaves will pound the catalyst structure to dust. Actually bigger chunks than dust, but you get the idea. Expensive system, two step rev limiters...
    There are two theories to arguing with women. Neither one works

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    What exactly is and two-step and what does it do performance wise??

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    Anybody?

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    Nevermind...

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    Click here to enlarge Originally Posted by J*U*icEd_n54 Click here to enlarge
    Nevermind...
    What, you know now?
    It is a
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    It's a thing that makes your car faster, no one can give you a better definition.

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    Its been known that two steps or anti lag setups shouldnt be used on catted cars...makes a mess lol

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    Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
    Hey guys,

    In doing lots of 2step testing recently with our factory cats in place we've accidentally stumbled upon a free downpipes DIY... :happy :lol

    http://www.bimmerboost.com/images/im...09/dpdiy-1.jpg
    Maybe a dumb question and obviously not advised but do you know if there is a way to get rid of the cats in our stock down pipes so we wont have to go after market?
    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    Keep on jealousing.

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    Click here to enlarge Originally Posted by dOpEdUpM3 Click here to enlarge
    Maybe a dumb question and obviously not advised but do you know if there is a way to get rid of the cats in our stock down pipes so we wont have to go after market?
    Yes, just install a 2step and bang on it all the time. Click here to enlarge

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    Click here to enlarge Originally Posted by dOpEdUpM3 Click here to enlarge
    Maybe a dumb question and obviously not advised but do you know if there is a way to get rid of the cats in our stock down pipes so we wont have to go after market?
    a few knocks with a beautiful hammer would do the job.

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    Click here to enlarge Originally Posted by Sorena Click here to enlarge
    a few knocks with a beautiful hammer would do the job.
    Click here to enlarge Why has Big Tom not made a DIY for this yet?
    Click here to enlarge Originally Posted by Twinturbom3 Click here to enlarge
    Keep on jealousing.

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