2011 Audi S4 V6 Black Supercharged Tuned Cold Air Intake w/ MR Tech, Alum Air Box Cover by Injen (SP3080BLK) Injen

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.