Injen 04-07 STi / 06-07 WRX 2.5L Black Cold Air Intake

If you're looking to get more air into your 2004-2007 Subaru Impreza WRX STI or 2006-2007 WRX, this Injen SP Series Cold Air Intake is a solid choice. It's designed to let your engine breathe deeper, which can lead to noticeable improvements in performance. Injen has been a leader in tuned intake systems for a long time, holding several patents on their tuning process, which helps ensure you get safe power gains without messing up your air-fuel ratio.

The intake tube itself is made from 6061-T6 aluminum, shaped to provide a smooth, uninterrupted path for air. This design helps reduce restrictions compared to the stock intake. It comes with a serviceable SuperNano-Web dry air filter that offers good filtration while still allowing plenty of air through. You'll also notice a more aggressive engine sound when you step on the gas, adding to the driving experience.

This kit includes everything needed for installation, and Injen backs it with a limited lifetime warranty. It's designed as a direct replacement for your factory intake, so no additional tuning is required to see the benefits.