Intake Cold Air Black 16-17 STI (No 2018+ STI)PSP INT 323BK OVERVIEW Increase horsepower and style under your hood. PERRIN Intake Systems use proper MAF alignment and plumbing size, both of which are crucial to maintain proper air fuel ratios and prevent check engine lights that plague competitors. PRECISION CONSTRUCTION Our intakes are constructed from aluminum tubing, which is precision CNC mandrel bent, for consistent and perfectly fitting parts. Our MAF sensor bung is CNC machined for perfect