The Injen SP Series Intake Systems Feature the Patent Pending MR Technology Process for Optimal Gains and a Safe A/F Ratio. The Injen SP Series Intake System does not limit itself to just a Cold Air System or Short Ram System. The MR Technology process has its effects on both types. The Injen SP Series Intake is The World's First Tuned Intake SystemInjen'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.