System Features Gen II Heater with Defrost and Servo Door ControlNew design provides superior performance from servo-motor-controlled air door improved case design and our exclusive electronic servo-actuated heater control valve. New 3-knob control operates temp fan speed and heat/defrost balance. Includes universal defrost ducts. Also may be used with optional dash louvers.Includes 3-knob control panel (knobscan be mounted directly into dash).Electronic Servo Heater Control Valve included with kit. Instructions Installation Instructions download Vehicle Fitment warning California Proposition 65 arrow_drop_down WARNING: California proposition 65