The Case Optum 300 6.5 CVX Tier 4B 300hp (All) produces 300bhp and 1282Nm in standard form. Our Stage 1 ECU tuning file raises output to 350bhp and 1480Nm, a gain of 50bhp and 198Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.