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LS6 Manifolds

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Old 05-01-2012, 11:23 AM   #1
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Default LS6 Manifolds

I want to replace the LS1 manifold with the LS6. I see there are 2 different part numbers 88894339 and 12573572. Are there any differences between the two? Also I will be installing 243 heads some time this winter.
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Old 05-01-2012, 01:40 PM   #2
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i wouldnt imagine the internal of the intake be any different. maybe something cosmetically. from what i gather, the 888 intake is the one from the 01-02 f-body, and the 125 intake is from the z06 or ls2 motors. im a noob, but im fairly confident.
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Old 05-01-2012, 01:51 PM   #3
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One has provisions for egr and the other doesn't. its the Slp version that has the egr
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Old 05-01-2012, 02:27 PM   #4
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I would just go ahead and find a used one that's for sale in our classifieds section. No need to buy a brand new one.
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Old 05-01-2012, 04:22 PM   #5
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One has provisions for egr and the other doesn't. its the Slp version that has the egr
Neither one of those intakes is the SLP version
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Old 05-01-2012, 05:53 PM   #6
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its the egr provision
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Old 05-01-2012, 06:46 PM   #7
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I didn't know what the model# was for the Slp one I just figured 2 different ls6s it had to be one or the other
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Old 05-01-2012, 10:11 PM   #8
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Quote:
Originally Posted by 38DD2436 View Post
I want to replace the LS1 manifold with the LS6. I see there are 2 different part numbers 88894339 and 12573572. Are there any differences between the two? Also I will be installing 243 heads some time this winter.
There is no difference between the two. Just make sure the bottom is flat, the bottom on the LS1 intakes are not.
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Old 05-02-2012, 08:24 PM   #9
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The one that came off my '03 Corvette engine was #12561182. The bottom was flat but had stiffening ribs, is this what you consider the LS-6 bottom?
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Old 05-02-2012, 09:00 PM   #10
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Quote:
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The one that came off my '03 Corvette engine was #12561182. The bottom was flat but had stiffening ribs, is this what you consider the LS-6 bottom?
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Old 05-03-2012, 10:38 AM   #11
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Originally Posted by S10xGN View Post
The one that came off my '03 Corvette engine was #12561182. The bottom was flat but had stiffening ribs, is this what you consider the LS-6 bottom?
That would be the one
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Old 05-03-2012, 09:26 PM   #12
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Thanks! I just got another one (12573572) off a '99 F-body engine that had been upgraded with the LS-6 manifold and (#243) heads...
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