correct heads for engine
After researching the numbers on the heads today I descovered that these are the correct heads for the LS5 engine according the the casting numbers. The numbers on both heads are 3993820. They are oval port heads. I also found some other numbers on the heads that I do not know what they mean. On one head it says GM9T and on the other it says GM11T. Maybe it just meand one is a right and one is a left. Not sure. Anyone know what these numbers might mean?
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