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There isn't one, sadly, unless by chance the CR-Z and Insight FD are interchangeable. You could get an HCH transmission and put the Insight's final drive in it to have a more linear 5 speed (and no eventual gear grind problem). The L15B transmissions from 2015+ Hondas have a remote chance of fitting, but I'd give it 50-50 tops, and they still don't have great final drives. You could reach out to one of the communities who mod Hondas for racing/drag - often people pair turbos with taller final drive, and this *might* exist in the CR-Z. The CR-Z's FD might be interchangeable with the 2015+ Fit and 2016+ Civic 6 speed final drives.
The K series have so many gearing options only because there are a variety of cars which come with them, some with large engines and large tires and some with smaller displacement and small tires, ranging from the Honda Odyssey/Element/CR-V on one end, to the RSX/Civic EP3 on the other.
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