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Gm Lsx 427, 454,468, 482

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Old 01-10-2007, 08:55 AM   #1
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Default Gm Lsx 427, 454,468, 482

I know alot of people are waiting for this block to hit the market. So am I Anyway, with these large cubic inch engines will we have to run a 2'' header because of the larger bore and big heads?
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Old 01-10-2007, 01:35 PM   #2
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Large primary headers would be ideal for any LSx over 400ci. For the tall deck version of the block, you will need custom headers because the heads will sit higher, or you might be able to bend a set of normal ones, not sure.
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Old 01-10-2007, 09:47 PM   #3
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Quote:
Originally Posted by Ferocity02
Large primary headers would be ideal for any LSx over 400ci. For the tall deck version of the block, you will need custom headers because the heads will sit higher, or you might be able to bend a set of normal ones, not sure.
Will the tall deck version of the block that sits higher (with the heads) clear the hood of a stock C5 vette and stock LS1 F-body?

Can't wait until these motors are being produced as readily as LS2 402 motors having been made the last year and a half!!
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Old 01-10-2007, 10:04 PM   #4
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Quote:
Originally Posted by MTI 427 C5 Roadster
Will the tall deck version of the block that sits higher (with the heads) clear the hood of a stock C5 vette and stock LS1 F-body?
I'd imagine it would.
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Old 01-10-2007, 10:40 PM   #5
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Kooks has an off the shelf header with 1 7/8" primaries that step to 2"
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Old 01-14-2007, 05:30 PM   #6
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Quote:
Originally Posted by rookie89
Kooks has an off the shelf header with 1 7/8" primaries that step to 2"
That's what I have for my 454.
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Old 01-14-2007, 09:58 PM   #7
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Quote:
Originally Posted by Beast96Z
That's what I have for my 454.
hahaha. The reason I know that is because I read it in one of your posts
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