The Evolution ACU150 Hydraulic Autopilot System Pack is a complete autopilot-in-a-box kit that is ready to install on many popular fishing and cruising powerboats with hydraulic steering. EV-150 system is engineered specifically to meet the needs of small to medium sized hydraulically steered vessels with a steering ram capacity between 4.9 cu. in.( 80cc) and 14.0 cu in (230cc). The EV-150 system is for 12-volt DC electrical systems only. The system comes complete with our p70Rs autopilot controller, EV1 Sensor Core, ACU150 Actuator Control Unit, Type 1 Hydraulic Pump, and an Evolution autopilot cabling kit. Raymarine Part #T70330.