The AEM 19-21 Subaru WRX STI 2.5L H4 Cold Air Intake System is a performance upgrade designed to enhance airflow and increase horsepower and torque for Subaru WRX STI models from 2019 to 2021. Constructed with a mandrel-bent aluminum intake tube and featuring an oversized AEM DRYFLOW synthetic washable air filter, this system ensures optimal airflow, filtration, and durability.
