Cylinder head id

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Jul 10, 2014 | 12:54 AM

occhevelle

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Cylinder head id

I have a pullout LS1 from a 04 GTO (so I was told). I checked the heads and either I'm having a moment or the casting numbers are ground off. Is this normal or am I looking in the wrong place? Can I id them from the longer number below?

Last edited by occhevelle; Jul 10, 2014 at 01:51 AM.

Jul 10, 2014 | 08:15 PM

poltergeist 02

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Do you have pics of the exhaust ports?

Jul 10, 2014 | 08:52 PM

occhevelle

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I would have to pull my headers off. Engine is in the car

Jul 11, 2014 | 06:10 AM

poltergeist 02

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Do you remember if they had D shaped ports?

Jul 11, 2014 | 07:15 AM

JRENIGAR

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Casting # should also be in the rocker valley.

Jul 11, 2014 | 10:32 AM

occhevelle

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I found a pic from when I was installing the engine and the exhaust ports are round

Last edited by occhevelle; Jul 11, 2014 at 11:08 AM.

Jul 11, 2014 | 06:17 PM

poltergeist 02

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I'm going to guess they are 241's then. I'm not sure why they would go through the trouble to do that if they are 241's though.

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Jul 12, 2014 | 08:42 AM

occhevelle

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Or maybe an indication somebody did some work to the stockers but it sounds like there's no easy way to figure that out. I'll think that way to make myself happy. Thanks for the replies.

Last edited by occhevelle; Jul 12, 2014 at 10:42 AM.

Jul 12, 2014 | 05:50 PM

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poltergeist 02

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Quote:

Originally Posted by occhevelle

Or maybe an indication somebody did some work to the stockers but it sounds like there's no easy way to figure that out. I'll think that way to make myself happy. Thanks for the replies.

For the sake of finding a good deal, I hope your right!