If u put extra mods on the car you would be foolish not to tune. Clean under the curve, all the other little things and to make sure afr is good n not lean. The computer will always compensate but ur prolly making it more difficult for ecu to compensate. In the end a tune is like 500. After spending all the money on buying an Infiniti and the expensive mods for this car, why skimp out on the tune that will help greatly reduce detonation? Makes no sense to me.
Good luck, to each his own.
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