Injen's Evolution air intake system for the 2015 Subaru WRX STI features a super-nano web dry filter and massive horsepower and torque gains. During testing at Injen, this intake resulted in a 26 hp and 35.5 ft/lbs of torque gain. The enclosed airbox design offers a clean look and superior heat protection compared to traditional open element systems.

The Injen Evolution intake replaces the factory airbox and intake tube and also includes a custom air scoop. The existing MAF sensor and hoses connect to it to ensure a proper fit with no check engine lights.

Check out the very nice install Video . Note that we recommend custom ECU tuning with the installation of any intake on the STI, and this intake is no exception.

Fits all 2015-2017 Subaru WRX STI. Does NOT fit 2018 WRX STI.