Injen 2007-09 Sentra SER 2.5L 4 Cyl. Polished Cold Air IntakeThe 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 System This Part Fits: Year Make Model Submodel 2007 2012 Nissan Sentra SE R 2007 2012 Nissan Sentra SE R Spec