Injen 18-21 Subaru WRX STI H4-2.5L Turbo SP Aluminum Series Cold Air Intake - Wrinkle Red

You're looking at the Injen SP Aluminum Series Short Ram Air Intake for your 2018-2021 Subaru WRX STI with the H4-2.5L Turbo engine. This kit includes the wrinkle red aluminum intake tubing, a SuperNano-Web dry air filter, and a custom heat shield designed specifically for your STI. It's a direct replacement for the factory airbox, designed to let your turbo breathe more freely and reach its full power potential.

The 6061-T6 aluminum tubing is mandrel-bent for a smooth, uninterrupted path for air, and Injen's patented MR Technology helps maintain safe air-fuel ratios while boosting performance. You can expect dyno-proven gains of up to 26 horsepower and 24 lb-ft of torque, and you won't need a tune to get these numbers. Plus, it adds an aggressive, throaty tone to your engine's sound under acceleration.

This intake is made in Pomona, California, and comes with Injen's limited lifetime warranty. While it's not CARB approved and cannot be shipped to California, it's a solid option for improving your STI's performance and sound.