AEM Cold Air Intake System for 2015-2021 VA Subaru STi (21-863C) BorgWarner 9-blade FP54 turbine wheel paired

9-blade FP54 turbine wheel paired with a 73 HTZ compressor wheel to make a quicker spooling Green that still flows 57LB per minute

This black plastic cover is the large undertray under the engine compartment

Part Numbers: Diagram: Placement: 76851JF00A

Watching your precise exhaust temperature can mean the difference between maximum performance and catastrophic engine damage

AEM Cold Air Intake System for 2015-2021 VA Subaru STi (21-863C) BorgWarner 9-blade FP54 turbine wheel pairedAEM cold air intake systems are engineered to boost horsepower and torque, featuring an oversized AEM DRYFLOW synthetic washable air filter for superior airflow, filtration, and performance. Custom engineered tubes deliver better airflow than you get with a stock intake. More air means better performance. The system includes a mandrel bent aluminum intake tube, high quality hardware, and a custom heat shield to protect intake air from engine bay heat.