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  1. #1
    IrishGpr05's Avatar
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    GPR Waterbox Measurements?!?!

    Does anyone know the size of the inlet and outlet of the stock water box on a GPR?

    -Jon


  2. #2
    IrishGpr05's Avatar
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    Another question..has anyone done any testing on a TDR waterbox on a 1300 and I don't mean a efi 1300. A 1200 bored to 1300.

    -Jon

  3. #3
    One day at a time..... N8R's Avatar
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    1300 waterbox
    enrty- 4 1/2" outer with lip/ 3 3/4" inner
    exit- 3 3/8" outer with lip/ 3 5/8" inner

  4. #4
    philip_gpr's Avatar
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    a couple of others have tested the TDR and it is real loud and slow

    if you want to try something else grab one of those 1300 waterboxes for sale

  5. #5
    Happily Self-Employed WFO's Avatar
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    Phillip... remember this ?
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  6. #6
    Happily Self-Employed WFO's Avatar
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    Hint: baffle mod on TDR box

  7. #7
    IrishGpr05's Avatar
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    hmmmm.....interesting...

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