3.9 V6 242hp Stage 1 tuning

The Chevrolet Monte Carlo 3.9 V6 242hp produces 242 hp and 328 Nm as standard. The YASTUNING Stage 1 remap file takes it to 260 hp and 350 Nm, a gain of +18 hp and +22 Nm. Engine code LZ9. ECU: Delco E38. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.