help, retune lose power

Zero dark

Im a tune noob and only minimal ideas on how it works but here goes

Tune #1
HFC
K&N Intakes
AAM Short tails

baseline 265
tuned to 309

Tune#2
replaced K&N with Takeda CAI (installed 3 weeks ago)
replaced nismo hpipe and midpipe with AAM S-Line Midpipe (installed today)

Time between tune, maybe 3 months
NOTE*** my check engine light came on last week for post cat fuel trim lean bank 1 and bank 2, car was noticably sluggish, and exhaust note didnt sound as good

baseline 275
tuned 286


how is this possible? tuner did not have a direct reasoning to justify these numbers, they were made on same dyno, DynoDynamics

only reasonable explanation was the CAI has some sort of restriction to affect this power loss


Any ideas?

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MD Art Pipes, MD Shockwave exhaust, AAM Intakes, Stillen Crank Pulley, Z1 25 Row Setrab, Whiteline Diff Bushings, 20mm H&R spacers, BC-BR Coils, GT-R push button, 3M, Tommy Kaira Knob, Takata Drift III, Custom Harness Bar, Zwork Headlights, EVO-R, Uprev