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Order This File Ask a QuestionThe Buick GL8 3.0 V6 254hp (All) produces 254bhp and 290Nm in standard form. Our Stage 1 ECU tuning file raises output to 285bhp and 330Nm, a gain of 31bhp and 40Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.