Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished turn14-in-stock Replace the Polyphonic Harmonizer behind

Replace the Polyphonic Harmonizer behind the muffler in the ATAK(r) system with muffler 60679 to attain the "S-Type" sound level (quieter than ATAK(r))

Stock Shift Knob: 180g

Is your factory speed limiter hampering performance at the top end of the track

Manufacturer Part # : HP87510408

Injen 18-21 Subaru WRX STI H4 2.5L Turbo SP Aluminum Series Cold Air Intake - Polished turn14-in-stock Replace the Polyphonic Harmonizer behindManufacturer Part # : SP1208P Market Description Injen Technology has done it once again with this new short ram air intake for the 2018 2021 Subaru WRX STI Equipped with the H4 2. 5L Turbo Engine. The Injen Technology SP1208 performance air intake system is the result of countless hours invested in research and development to provide a proven intake system designed to add power and performance to your STI. The Injen Technology SP1208 intake system is