The Case Magnum 290 8.7 Tier 4A 284hp (All) produces 284bhp and 1397Nm in standard form. Our Stage 1 ECU tuning file raises output to 356bhp and 1648Nm, a gain of 72bhp and 251Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.