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Old Jan 14, 2015 | 05:52 PM
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x275radial's Avatar
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Default Intake manifold

Anyone know if this intake will fit a 5.3 with cathedral ports. It's a hundred dollars cheaper than the ls1 intake.
ACDelco 12602477 GM Original Equipment Intake Manifold

Looks like maybe ls3. Didn't know if it had square ports and would cause a vacuum leak or would just be fine.
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Old Jan 14, 2015 | 06:14 PM
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Negative! That intake fits an LS3 or L99 6.2l engine with square ports. It will not work with the cathedral port heads.
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Old Jan 14, 2015 | 07:31 PM
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Thank you. I'll just order the ls1 manifold from dorman.
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Old Jan 14, 2015 | 10:09 PM
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If you want a fast intake look in the regional part of the forum Texas members, there is a guy selling two fast 90's for $700 each shipped. You may not be looking to spend that much but it's a thought. I sure would love to get one of them for myself, just got to much going at the moment.
Goodluck!
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