Perrin PSP-INT-322RD Cold Air Intake Kit for 08-14 Subaru WRX/STI 2.5L Turbo L4

Vehicle Fitment

• 2008-2014 Subaru Impreza WRX (GE/GH/GR/GV)
• 2008-2014 Subaru Impreza WRX STI (GR/GV)

Fitment Notes

• Fits Subaru EJ255 (WRX) and EJ257 (STI) turbocharged engines
• Does NOT fit 2015+ WRX (FA20DIT engine) - use PSP-INT-325 for 2015+ WRX
• CARB E.O. Number: D-735
• No tune required when used on stock vehicles with only catback exhaust and intercooler
• Custom ECU calibration REQUIRED if using COBB AccessPORT OTS tunes or other power-adding modifications
• Replacement filter: X-PSP-INT-324 (2.75" ID x 11" Length Dryflow)
• Shorter filter (X-PSP-INT-324-2) required when used with PERRIN FMIC

Features

• Adds 15-30 wheel horsepower (results vary based on modifications and tune)
• Increases horsepower, torque, and improves throttle response
• Reduces turbo lag with increased airflow potential
• Precision CNC mandrel bent aluminum tubing for consistent perfect fit
• CNC machined MAF sensor bung for perfect alignment - crucial for proper air/fuel ratios
• Integrated airflow straightener for smooth, predictable MAF readings
• Dryflow filter provides same protection as oiled filters with less maintenance
• Oil-free synthetic filter media - no risk of over-oiling or MAF contamination
• Rigid screen inside and around filter media for debris protection
• Ideal for dusty and rough driving conditions
• Enhanced turbo and blow-off valve sound under load
• Textured red powder coat finish for lasting protection and appearance
• T-bolt clamps with built-in liner prevent silicone coupler damage
• Laser-etched PERRIN logo on clamps

Specifications

• Part Number: PSP-INT-322RD
• Brand: PERRIN Performance
• Type: Cold Air Intake System
• Horsepower Gain: 15-30 WHP (Estimated)
• Tubing Material: Aluminum (CNC Mandrel Bent)
• Tubing Inner Diameter: 2.75 Inches
• Finish: Textured Red Powder Coat
• Filter Type: Dryflow (Oil-Free Synthetic)
• Filter Inlet: 2.75 Inches
• Filter Length: 11 Inches
• MAF Sensor Bung: CNC Machined for OEM MAF
• Clamp Type: T-Bolt with Liner
• CARB Legal: Yes - E.O. Number D-735 (2008-2014 WRX / 2008-2015 STI)
• Installation Difficulty: Intermediate
• Origin: Made in USA
• Warranty: 5 Years (60 Months)

Included Components

• (1) PERRIN Cold Air Intake Tube (Red Powder Coat)
• (1) PERRIN Dryflow Air Filter (2.75" ID x 11" Length)
• (1) Airflow Straightener
• (1) Silicone Turbo Inlet Coupler
• T-Bolt Clamps with PERRIN Logo
• All Necessary Mounting Hardware
• Installation Instructions

Product Description

The PERRIN PSP-INT-322RD Cold Air Intake System in red delivers 15-30 wheel horsepower gains for 2008-2014 Subaru WRX and 2008-2015 STI models equipped with the EJ25 turbocharged engine. PERRIN's intake system uses proper MAF alignment and tubing size - both crucial for maintaining proper air/fuel ratios and preventing the check engine lights that plague competitors. The precision CNC mandrel bent aluminum tubing ensures consistent, perfect-fitting parts, while the CNC machined MAF sensor bung provides exact alignment for reliable ECU engine management. The integrated airflow straightener forces incoming air into a uniform profile, ensuring smooth and predictable MAF sensor readings for consistent horsepower gains. The Dryflow filter provides the same protection as an oiled filter without the mess or risk of over-oiling that can contaminate MAF sensors. The rigid screen inside and around the filter media protects against debris, making it ideal for dusty and rough driving conditions. During normal driving the intake sounds relatively stock, but under load it comes alive with an aggressive turbo flat-4 sound and prominent blow-off valve response. Finished in durable textured red powder coat that looks great for years. CARB approved (E.O. D-735) for 50-state legal use on 2008-2014 WRX and 2008-2015 STI. No tune required on stock vehicles. Made in the USA with a 5-year warranty.