High Altitude Kit
When principally operating vehicle at altitudes above 4000 feet (1200 m), emission control system requires minor modification to meet emission control standards at high altitude.
NOTE:
When installing a high altitude kit, refer to manufacturer's instructions supplied with the kit.
When a vehicle modified to high altitude specifications is principally used at altitudes below 4000 feet (1200 m), the emission control system must be remodified to the original specifications.