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Old Mar 31, 2005 | 06:04 AM
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I got a guy on ebay who claims he has 2004 LS1 C5 corvette heads for sale and that the casting number is 241. Is this correct? Reading in the ls1/ls6 performance books I believe he is wrong, but dont know for sure. All the vettes from 2001 and up were standard with the ls6 heads/motor and a 243 casting number right?
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Old Mar 31, 2005 | 07:09 AM
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I would have to go home and pull out my books as well, but I don't think the heads were the same, only the block.
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Old Mar 31, 2005 | 02:05 PM
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No, not all 01+ Vettes have the LS6 heads or motor. Some probably have an LS6 block similar to the 01 and 02 Fbodies but that # is probably in the 25%. They do have the LS6 intake tho, just not the heads and block.
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Old Apr 9, 2005 | 07:22 PM
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241 heads... LS1.. 243 heads LS6 (ZO6 0nly)
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Old Apr 14, 2005 | 05:44 PM
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Originally Posted by Ling_650vette
No, not all 01+ Vettes have the LS6 heads or motor. Some probably have an LS6 block similar to the 01 and 02 Fbodies but that # is probably in the 25%. They do have the LS6 intake tho, just not the heads and block.
Intakes - Yes, all 01 and up LS1s get LS6 manifold
Heads - No, LS1s get LS1 heads (241 casting)
Blocks - Some late 01s and all 02s and up get the LS6 casting.
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Old Apr 15, 2005 | 12:34 AM
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Are these few cars with the LS6 castings benefited with any extra power? Or is it just about more strength?
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Old Apr 20, 2005 | 12:17 PM
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Originally Posted by SJTrance
Are these few cars with the LS6 castings benefited with any extra power? Or is it just about more strength?
No extra power just strength.aka beefier bottom end.
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Old Apr 20, 2005 | 03:26 PM
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So your telling me that the flow numbers for the head castings is the same in the ls1/ls6? I do believe the LS6/243 casting has different heads flow nubmers and thus perform better at high rpm power.
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Old Apr 20, 2005 | 08:19 PM
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243's castings are found on LS6 engine for ZO6. 241's are on the LS1 just as fastbasser said
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Old Apr 20, 2005 | 09:03 PM
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Originally Posted by my01camaroz28
So your telling me that the flow numbers for the head castings is the same in the ls1/ls6? I do believe the LS6/243 casting has different heads flow nubmers and thus perform better at high rpm power.
LS6 heads flow much better than the LS1 heads, you can pick up about 20 HP by changing the ls1 heads to ls6 heads, stage 1 or 1.5 ported ls1 heads flow about the same as ls6 heads.
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Old Apr 20, 2005 | 09:38 PM
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Same w/ LQ4 and LQ9 truck heads.
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