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The COBB Stage 1+ power package for the Nissan GT‑R with TCM flashing indicates the package includes both engine tuning and transmission calibration work to refine shift behavior along with power delivery. This bundled Stage 1+ option is intended for owners who want coordinated ECU and TCM adjustments for a more integrated driving response; consult COBB documentation for exact map and hardware details.
Cobb Nissan GT-R Stage 1+ Power Package NIS-006 w/TCM Flashing
