4.8 V8 279hp Stage 1 tuning

The Chevrolet Express 4.8 V8 279hp produces 279 hp and 400 Nm as standard. The YASTUNING Stage 1 remap file takes it to 300 hp and 430 Nm, a gain of +21 hp and +30 Nm. Engine code L20. ECU: Delco E38. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.