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LS6 coolant crossover?

This is a discussion on LS6 coolant crossover? within the External Engine forums, part of the LSx Technical Help Section category; I just got a new FAST intake manifold in the mail today, and I read that I need to get ...

  1. #1
    Aw shucks. bluefields88's Avatar
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    LS6 coolant crossover?

    I just got a new FAST intake manifold in the mail today, and I read that I need to get some LS6 coolant line crossovers. I know what the original coolant lines look like that run under the stock LS1 intake, but I'm not sure what the new pipes I need to buy look like, and does anyone know where I can get them?

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    I am pretty sure one of our sponsors carries them. But I would think that you would be able to use the stock coolant lines. But then again, I don't have a FAST intake.

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    Aw shucks. bluefields88's Avatar
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    nope, the bottom of the FAST intake takes up as much room as a LS6.

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Quote Originally Posted by bluefields88 View Post
    nope, the bottom of the FAST intake takes up as much room as a LS6.
    If that is so, then you CAN use the LS1 coolant lines.

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    Aw shucks. bluefields88's Avatar
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    FAST says to get the Z06 coolant lines in the instructions, so I'm going to get some. don't want to risk wasting my time when I install it

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    Quote Originally Posted by bluefields88 View Post
    FAST says to get the Z06 coolant lines in the instructions, so I'm going to get some. don't want to risk wasting my time when I install it
    I just ground off the excess grid material on the bottom of my LS6 manifold when I installed it. Not sure if the FAST has enough extra material on the bottom to do that though.

    They say the LS6 coolant line setup doesn't cool the number 7 cylinder as well as the LS1 setup, which is why I just opted to modify the intake to fit instead of chaning the coolant crossover.

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    Just me Y2KPewterSS's Avatar
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    Thunder carries the LS6 crossover.
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    Member blackls1ta's Avatar
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    Quote Originally Posted by bluefields88 View Post
    I just got a new FAST intake manifold in the mail today, and I read that I need to get some LS6 coolant line crossovers. I know what the original coolant lines look like that run under the stock LS1 intake, but I'm not sure what the new pipes I need to buy look like, and does anyone know where I can get them?
    i got mine from thunder racing ,you do need them if your converting from ls1 intake to a ls6 or fast intake

  9. #9
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Quote Originally Posted by blackls1ta View Post
    i got mine from thunder racing ,you do need them if your converting from ls1 intake to a ls6 or fast intake
    You do not need them for the LS6 intake.
    I have the LS1 coolant crossover pipes w/ an LS6 intake.

  10. #10
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    I am pretty sure that SSwt00SS has the Fast intake. Try shootin him a PM

  11. #11
    Aw shucks. bluefields88's Avatar
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    I already bought a crossover kit off ebay for $34. it's on it's way.

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