Now it looks like the take rate for Manual on the GT3 is 2/3 in the US.
This is pretty entertaining:
http://www.autoblog.com/2018/03/30/porsche-gt3-manual-america-opinion/
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18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi