2003-2006 Nissan 350 , SP Series Short Ram Intake System by Injen. The Short Ram is a traditional air intake system that takes the place of your factory airbox and factory air intake ducting. Injen's SP series features an EA Nanofiber air filter allowing improved airflow.The intake tube is made of aluminum alloy, mandrel formed thereby smoothing the airflow path into the engine. The increase in airflow and air velocity translates into more efficient operation allowing for more power, increased throttle response and better fuel economy. Converts to a short ram as well.