2006-2009 Honda Civic Si 2.0L 4Cyl. Coupe & Sedan Polished Short Ram Intake by Injen (SP1577P)
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.