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Order This File Ask a QuestionThe Buick GL8 2.0T 260hp (All) produces 260bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 300bhp and 450Nm, a gain of 40bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.