Injen 2017+ Honda Civic Si 1.5L Black Cold Air Intake

If you're looking to get more air into your 2017-2020 Honda Civic Si, this Injen SP series cold air intake is a solid option. It's designed to let your engine breathe deeper, which can help unlock some extra horsepower and torque you might be missing out on. Injen has been in the intake game for a while and holds patents on their tuning process, which they say helps ensure safe air-fuel ratios while improving performance.

The intake tube itself is made from 6061-T6 aluminum, giving a smooth path for air to enter the engine. This design, along with Injen's patented MegaRam (MR) Technology and Air Fusion, is what helps the system achieve its claimed gains of up to 29 horsepower and 25 lb-ft of torque. It also comes with a serviceable SuperNano-Web dry air filter that's designed to offer good filtration without restricting airflow too much. You'll likely notice a more aggressive engine sound under acceleration, too.

This kit includes everything you need for installation, and Injen states no additional tuning is required. Just keep in mind that this intake is not CARB exempt and cannot be shipped to California or used on vehicles registered there.