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LS9 vs LSA bare head casting differences...

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Old Nov 24, 2014 | 06:43 AM
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Default LS9 vs LSA bare head casting differences...

Anybody know exactly what all is different between these head castings? I know the LS9 has larger bolt holes, and I know the assembled versions have different valves. I thought the heads were the same casting but they have different part # and different price so now i'm not sure?
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Old Nov 26, 2014 | 10:37 AM
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I'm not sure either but I also think the LS9 and LSA use the same casting. The different part numbers are probably because the LS9 head gets different machining after it's cast.
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