The Pontiac Grand Am 3.1 V6 155hp (1997 - 2005) produces 155bhp and 251Nm in standard form. Our Stage 1 ECU tuning file raises output to 175bhp and 270Nm, a gain of 20bhp and 19Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.