Civic Hatch 2017 MT, flashing CARB unit to +9 psi?

donald_s

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Don
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Los Angeles
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Honda Civic Sport Manual
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3 months ago I got the CARB Hondata unit and flashed the ECU to the base +6 psi. It seems to be fine and the increased HP is very nice. Mileage sucks of course when I'm pushing it, but I went for a 50 mile drive yesterday that was mostly highway and was seeing 41mpg.

However there is a +9psi 'professional' program available. Would that be something I'd regret doing? Will I be replacing the engine at 20k miles?

Thanks!

Donald
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