Just an FYI we did the first 2015 and to our surprise it needed almost nothing! The car had FI LTH, CBE, gen 3, ported lower, upper and TB's and it barley needed tweeked. The newer the car it seems the less a tuner is needed. The adaptability of nissans Ecu is just amazing with the OEM widebands. We turned off the secondary O2 CELs, richened it up a little from 2-4k and that was it. The car was trying for full timing and running right where my tuner likes the ARF.
Before the tune AND ported parts the car made the same power in 5th gear. Only 4th gear showed the gains. The 15's also have more advanced TB's. Everything nissan does is just amazing OEM with the motor stuff. I would like to see 14 TB's though.
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