Adjusting A/F trims is good but I heard there is a lot of advanced timing in the tunes as well. Per previous discussions in posts, the A/F adjustment is safety only really not much power there. The timing is what is bringing the gains. I'd figure that the NISMO tune might also adjusting the valve timing a bit to properly get more out of the system, aside from just advancing the timing.
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2013 Ford Mustang GT
374rwhp, 360rwtq SAE / GT500 Axle-Backs / Brembo Pack / Track Pack / Recaros / 6spd
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