The Pontiac Firebird 5.7 V8 310hp (1997 - 2002) produces 310bhp and 461Nm in standard form. Our Stage 1 ECU tuning file raises output to 330bhp and 485Nm, a gain of 20bhp and 24Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.