Vortex ECU 19-26 Honda CRF450X 4-StrokeModel Specific Features Advanced Mapping for better traction and performance which suits aftermarket full system Maps supplied for both Yoshimura and FMF Full system Improved bottom end Power and throttle response Improved top end and over rev Power Power Ignition & Fuel Mapping for Standard Engine with aftermarket pipe and USA Intake manifold. Enduro maps for better traction and throttle control Higher Rev Limits with a smoother feeling spark cut