The Demon II is a hardware refresh that is replacing the original Demon for all USDM/EDM large box ECU NepTune RTP packages. -This sleeker unit is more stable when installed. -No longer requires a battery for data retention. -Comes with the TunerView Data Header and Analog Input header pre-installed. -Features a ferrite bead onboard to help reduce interference. -Two USB ports so you can decide whether to cut the ECU case or not.

The NepTune RTP System gets Sensor Adjustments, low/high switched boost cut,  4 extra analog inputs, and trace markers.