 Differences in LS1 cylinder heads? |
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 Mar 12 2006, 08:06 PM
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Zero brand loyalty  Group: Advanced Members Posts: 645 Joined: 22-January 04 From: Merryland Member No.: 145  |
I have a pair of LS1 cylinder heads (long story on how I got them). They're different castings, and I was wondering if anybody had any insight on their differences, if any. One I'm pretty sure is from an '01 Z28, the other one I'm not sure of (and can't remember which one is which).
On one of them, it reads "1256" on the inside where you usually find casting #s but then it also reads "4241" a few inches over. The only marking I could find on the other one is "I227." I was just looking to sell them but I don't want to sell them together if they can't be used together. I know with the thirdgens and other GM V8's there are all kinds of different casting #s and there are some physical/performance differences but have no clue on LS1 heads. TIA. Pat |
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Mar 13 2006, 05:49 AM
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Engine and Tools Moderator Group: Advanced Members Posts: 1,859 Joined: 23-December 03 From: Lebanon TN Member No.: 6 |
My 241 heads have the 3-digit number on the outer front corner on the passenger side head. Facing up. (and the driver's side head has it on the outer back corner).
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