3.9 V6 240hp Stage 1 tuning

The Pontiac Montana 3.9 V6 240hp produces 240 hp and 332 Nm as standard. The YASTUNING Stage 1 remap file takes it to 260 hp and 355 Nm, a gain of +20 hp and +23 Nm. Engine code LZ9. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.