Have a look at the Mopar CAI kit installed on a JL Rubicon, with installation manual, feedback and review. The Mopar CAI reuses the stock inlet and lower part of the air box. The main upgrade is its reusable filter and smoother airflow. A snorkel can be attached. The hood vent can be run closed or open and it can be installed by cutting (or not cutting) the hood.
Read the full post inside, including owner’s impressions of any sound and performance gains.