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Order This File Ask a QuestionThe Case Magnum 315 8.7 Tier 4A 311hp (All) produces 311bhp and 1531Nm in standard form. Our Stage 1 ECU tuning file raises output to 390bhp and 1820Nm, a gain of 79bhp and 289Nm, with no hardware modifications required. The file is delivered through the ByteFlash Portal and is ready to write to the vehicle.