Injen Cold Air Intake Polished 2008-2014 WRX / 2008-2014 STI
The Injen SP Series Air Intake Systems Feature the Patent Pending MR Technology Process for Optimal Gains and a Safe A/F Ratio. The SP series 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 is The World's First Tuned Intake System.