I believe it is 38.
I'll email them and see.
JE is pretty useless. I messaged them asking about octane for the 13.5:1 kit and they claimed I'd have to run over 100 octane and that even for the 12.5:1 kit I should be at ~97 octane.
Ugh, the stock bike is 12.4:1 and uses 87!
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