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The AEM Cold Air Intake for 2019–2021 Subaru WRX STI (2.5L H4) replaces the factory intake with a mandrel-bent aluminum tube, oversized conical AEM DRYFLOW washable synthetic air filter and a custom heat shield to reduce intake temperatures. The oil-free filter is reusable and can go long service intervals under normal highway driving. Typical installation takes less than 90 minutes and the system is engineered to increase horsepower and torque.
AEM 19-21 Subaru WRX STI 2.5L H4 Cold Air Intake System
