06 gto
The LS2 engines in the 06 were 05 spec engines.
And it's the colour of the crank sensor you need to look at to tell the difference.
Grey =58x


Black = 24x

You could also count the main harness connectors on the GTO computer.
The E40 used with 24x has 3 main harnesses.




E38 computer used with 58x has only 2.
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maybe next year--
did u get my email with the pictures?
Thanks
Nick--







