AEM Cold Air Intake System for 2015-2021 VA Subaru STi (21-863C) Intake Pipe Finish::Gunmetal Gray Mitsubishi Part Number Diagram PNC

Mitsubishi Part Number Diagram PNC MR520295 71092

It's smooth compared to "Disc B

With this set of Height Adjustable Lowering Springs

This is required by IHRA and NHRA at different levels of competition and if you are running slicks

If you need more details

AEM Cold Air Intake System for 2015-2021 VA Subaru STi (21-863C) Intake Pipe Finish::Gunmetal Gray Mitsubishi Part Number Diagram PNCAEM 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.