2004 - 2009
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Order This File Ask a QuestionThe Pontiac Grand Prix 5.3 V8 303hp (2004 - 2009) produces 303bhp and 438Nm in standard form. Our Stage 1 ECU tuning file raises output to 325bhp and 460Nm, a gain of 22bhp and 22Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.