For what it is worth, I ran across this; Bulletin #16-NA-369 earlier today.
It appears that this is a variant of the standard ZL1 for weight savings.
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Attached Images 
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On Order 2018 ZL1 1LE Garnet Red Tint Coat Metallic
MY Car
2015 Z06 Z07
Daytona Sunrise Orange Metallic
Dads Car
2013 ZL1 vin 963
Crystal Red Tint Coat/Black Wheels
Exposed Carbon Fiber Insert
6 Spd Manual
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