difference between 806 and 853 heads? - LS1TECH

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difference between 806 and 853 heads?

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Old 10-27-2003, 12:57 AM   #1
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Default difference between 806 and 853 heads?

Anyone know what the difference is between the heads with 806 casted on them and the ones with 853 casted on them? The board says my 98 should have 853 castings, but there is a big fat 806 casted on it? What does this mean? I couldn't find anything about 806 heads. Thanks guys.
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Old 10-27-2003, 02:39 AM   #2
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Default difference

i might be wrong, but i was told that 806 was the casting number used on the 97' ls1 vette heads. maybe your car was assembled with those instead of the 853's.
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Old 10-27-2003, 11:25 AM   #3
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The 806 heads will have the perimeter valve cover bolt holes and the 853 will have the center bolt valve cover holes. Not much else is different between the two.

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Old 10-27-2003, 11:28 AM   #4
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There is no difference.The #806 and the #853 were made with perimeter bolt valve covers.
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Old 10-27-2003, 09:48 PM   #5
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Quote:
Originally Posted by TVWilkes
There is no difference.The #806 and the #853 were made with perimeter bolt valve covers.
And the #241 were the 99+ center bolt LS1 heads
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Old 10-27-2003, 10:11 PM   #6
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Quote:
Originally Posted by TVWilkes
There is no difference.The #806 and the #853 were made with perimeter bolt valve covers.
I've seen over 50 sets of each and have never seen a single 853 casting with perimeter bolt holes. If they did make them, I'd like to know about it. There is a casting number 933 that was on the early C5s and is a perimeter bolt head. Could that be what your thinking of?

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Old 10-28-2003, 12:20 AM   #7
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Quote:
Originally Posted by Tin Indian
And the #241 were the 99+ center bolt LS1 heads
My 99 came with 853's, center bolt.
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Old 10-28-2003, 07:07 AM   #8
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Quote:
Originally Posted by 2xLS1
My 99 came with 853's, center bolt.
I think your right. The 241 is also a centerbolt. I wonder if the 241s came later than 99?
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Old 10-28-2003, 07:17 AM   #9
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Quote:
Originally Posted by Tin Indian
I think your right. The 241 is also a centerbolt. I wonder if the 241s came later than 99?
from my understanding the 241's were the 01-02 heads.
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Old 10-28-2003, 07:20 AM   #10
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Quote:
Originally Posted by Richard@WCCH
I've seen over 50 sets of each and have never seen a single 853 casting with perimeter bolt holes. If they did make them, I'd like to know about it. There is a casting number 933 that was on the early C5s and is a perimeter bolt head. Could that be what your thinking of?

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Old 10-29-2003, 12:23 AM   #11
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Quote:
Originally Posted by jrp
from my understanding the 241's were the 01-02 heads.
Correct. 241 is the 2001-2003 casting.
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