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Thread: Stock headers with heat exchangers what year are these?

  1. 10-02-2015, 03:20 PM #1
    55Outlaw
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    Stock headers with heat exchangers what year are these?

    Hi, I just bought these from an estate sale and need help identifying them, there are two different pairs of headers and one set of heat exchangers.

    Thanks for your time and yes they will be for sale once I get them identified,

    Michael
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    Michael Rogers
    Founder Nor Cal Vintage VW & Porsche Treffen and the Nor Cal Vintage VW & Porsche Swap Meet
    1971 911T Targa/gold metallic
    1969 912 Burgundy red
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  2. 10-02-2015, 03:52 PM #2
    gled49
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    thermal reactors, probably the worst exhaust porsche was forced to make for emission control. 75-77 911 USA or CA exhaust with air pump. pre Catalytic convertor system.
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  3. 10-02-2015, 04:02 PM #3
    55Outlaw
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    Thank you that is what I was thinking. Why are the ones attached to the heat exchangers different? they are much smaller in diameter and don't seem to have the packing material and second skin around them?
    Michael Rogers
    Founder Nor Cal Vintage VW & Porsche Treffen and the Nor Cal Vintage VW & Porsche Swap Meet
    1971 911T Targa/gold metallic
    1969 912 Burgundy red
    Rgruppe #833
    https://www.facebook.com/Nor-Cal-Vin...9809110032975/
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  4. 10-02-2015, 05:09 PM #4
    Harvey Weidman
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    The smaller ones are a feeble attempt to replace the thermo reactors with something that may not run as hot.....
    The tubed ones proved to actually work in reducing the temperature.....about 20-25 deg.
    H
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