Fitment: 2018 - 2021 Subaru STI (H4 - 2.5L Turbo). The Injen SP Performance Intake System directly replaces the restrictive factory airbox. It's engineered to let your turbo breathe deeply, unlocking its full power with an easy install. The 6061 - T6 aluminum air intake tube offers a smooth path for efficient airflow, boosting power and looking great under the hood. The Injen team maintained a safe air - fuel ratio across the power band. This intake comes with a fully serviceable Injen SuperNano - Web dry air filter, which increases filter surface area for better airflow and top - notch filtration. It adds 26 HP and 24 lb - ft of torque to your STI, delivering an aggressive and throaty tone. No tune is needed for these power gains. Features include a polished finish, dyno - proven power gains, short ram cold air intake design, patented MegaRam (MR®) Technology, no need for additional tuning or check engine lights, 3.250 - inch mandrel - bent intake tubing, a custom heat shield, an aggressive intake growl, smooth intake piping, and a limited lifetime warranty.
Using this Injen SP Short Ram Cold Air Intake is easy. First, remove the restrictive factory airbox. Then, install the intake system following the included instructions. It's a direct replacement, so it should fit right in. When your STI is running, you'll notice an immediate improvement in power and a great throaty sound. As for maintenance, the Injen SuperNano - Web dry air filter is fully serviceable. Check it regularly and clean it as needed. You don't need to do any additional tuning, and there should be no check engine lights. Just enjoy the extra power and performance this intake provides. Keep the intake in a clean environment when not in use, and avoid getting it wet. If you have any questions or run into issues, reach out to Injen's customer service as it comes with a limited lifetime warranty.
