2007-2009 Nissan Altima 4 Cylinder 2.5L w/ Heat Shield (Automatic Only) Polished Short Ram Intake by Injen (SP1974P)

SP Series Intake System:

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 System.