Perrin Cold Air Intake Black 2015-2021 WRXIncrease efficiency, style, and power potential under your hood. PERRIN Intake systems use proper MAF alignment and plumbing size, both of which are crucial to maintaining proper air fuel ratios and preventing check engine lights that plague competitors. No Tuning Required Increase horsepower and torque without ECU recalibration or tune! This part is designed to work safely on your vehicle without any tuning required! With our rigorous testing, you