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Order This File Ask a QuestionThe Case STX 450 14.9 457hp (All) produces 457bhp and 2263Nm in standard form. Our Stage 1 ECU tuning file raises output to 762bhp and 2650Nm, a gain of 305bhp and 387Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.