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Questions on ls6 intake upgrade

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Old Oct 4, 2015 | 09:31 AM
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Default Questions on ls6 intake upgrade

Is there a better part number fir the ls6 intake?
Is there a need to upgrade the throttle body, and if so what type?

Car is a cam only 2000 z28 a4.
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Old Oct 4, 2015 | 11:07 AM
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GM had a few different numbers for this manifold. If the one you get has a flat bottom, it's the correct LS6 manifold.

Avoid the new Dorman LS6 replacement. While it's the correct design, it's not very well made, internal components don't line up very well.

Your engine should have the original four corner steam port tubing. You'll need to shave the ribs off the bottom of the manifold to clear the tubing. It's best to retain the four corner steam port setup.
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Old Oct 4, 2015 | 12:08 PM
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Ported stock throttle body always seems to work well with the LS6.
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Old Oct 4, 2015 | 06:55 PM
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Originally Posted by Paul Bell
GM had a few different numbers for this manifold. If the one you get has a flat bottom, it's the correct LS6 manifold.

Avoid the new Dorman LS6 replacement. While it's the correct design, it's not very well made, internal components don't line up very well.

Your engine should have the original four corner steam port tubing. You'll need to shave the ribs off the bottom of the manifold to clear the tubing. It's best to retain the four corner steam port setup.
where have you seen that? i have seen the pics of them and they look to be well made people port them to get rid of the ridge in the runners but thats the same thing that people do to the older fasts as its the same design.
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Old Oct 4, 2015 | 07:44 PM
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I got an ls6 intake off 02' ribs on bottom have been shaved flat... pm me if interested
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