Subaru WRX STI Performance Cold Air Intake by Mishimoto The stock intake on the Subaru WRX STI is surprisingly restrictive which leaves a lot of room for improvement. Mishimoto's Engineers spent months fine-tuning the design of this intake so they could squeeze every bit of performance out of it that they could! Once complete and put on the dyno this air intakes provides 20whp / 19 wtq gains over the stock intake while maintaining safe air/fuel ratios. Perfect for someone looking to add an extra punch of power rather it be for the track or for general daily driving! No having to worry about emissions even if you live in California as this Cold Air Intake form Mishimoto is CARB certified with CARB EO# D-759-3! Intake piping is offered in 3 colors which are Wrinkle Black, Polished, and Wrinkle Red! Mandrel-bent aluminum piping utilizes the Mishimoto air straightener and CNC-machined mass airflow sensor (MAF) housing to provide accurate and consistent MAF readings which results into smoother power throughout the whole rev range! Free-flowing air filter provides a 16% greater surface area, optimal airflow, and proper filtration of any dirt and debris. Additionally this kit includes a silicone coupler, clamps and all other hardware needed to complete this installation! Designed in Delaware USa and backed by Mishimotos Limited Lifetime Warranty!Mishimoto Subaru WRX STI Performance Cold Air Intake Features: Direct fir for 2015+ Subaru WRX STI20whp / 18wtq Gains Mandrel-bent Aluminum Piping Available in Wrinkle Black, Polished, or Wrinkle Red CARB EO # D-759-3Designed and made in Delaware, USAMishimoto Limited Lifetime Warranty