Daytona Twin TEC LLC ECU - Harley-Davidson®906650411 Product Description Fully reprogrammable replacement ECU Alpha N fuel control (RPM + TPS) unaffected by long duration high overlap cams Auto Tune included wide band Bosch LSU 4. 2 sensors for both cylinders G7 = Non Integrated Modular Design wide band controller and USB interface are separate units G8 = Integrated Design wide band controller and USB C interface built into the ECU G7 and G8 ECUs function the exact same on the motorcycle