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LS2/LS6 head comparrision

This is a discussion on LS2/LS6 head comparrision within the Internal Engine forums, part of the LSx Technical Help Section category; Have a chance to buy a set of LS2 heads, is the only difference between them and the LS6 the ...

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    LS2/LS6 head comparrision

    Have a chance to buy a set of LS2 heads, is the only difference between them and the LS6 the sodium filled valves? Is this anything I should be concerned about? The LS2 are 243 casts......

    Thanks in advance

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    Slow'er'Ass Mr. Luos's Avatar
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    I thought they were the exact same. Valves could be a difference.

    I know the castings are the same.

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    You are correct the difference is in the Valves.
    The sodium filled ones are lighter.
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    67 Tempest, click the pic mullenh's Avatar
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    aren't the ls2's set for a 4 inch bore also?

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    Anyone tried the LS2 heads yet? What is the difference in the gains over LS6?

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    I really expect them to be just about the same or even a little less because of the sodium filled valves. The springs, valve size and castings are the same, from what I understand.
    I only went with the LS2 because I found a set of low mile take offs, at a reasonable price. Also I was very comfortable with the seller.

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    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
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    port them babies!

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    Quote Originally Posted by mullenh View Post
    aren't the ls2's set for a 4 inch bore also?
    I think any of the GenIII heads will work on the 4" bore. The L92 heads will ONLY work on a 4" bore due to the valve size.
    Just my opinion

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