The Mishimoto performance air intake for 2015–2017 Subaru STI replaces the stock airbox with a mandrel-bent aluminum tube, heat shield and oiled, serviceable filter to reduce intake temperatures and improve airflow. Dyno-proven gains up to 20 whp and 18 wtq are reported; the kit includes all hardware, a MAF housing and installs in under an hour while working with the stock tune for bolt-on power.
Mishimoto 2015 Subaru STi Performance Intake - Wrinkle Red