Mishimoto MMAI-STI-08WBK Cold Air Intake for 2008-2014 Subaru WRX/STI 2.5L

Vehicle Fitment

• 2008-2014 Subaru WRX (2.5L Turbo H4)
• 2008-2014 Subaru WRX STI (2.5L Turbo H4)

Features

• Direct-fit cold air intake engineered specifically for 2008-2014 Subaru WRX and WRX STI
• Mandrel-bent aluminum intake piping with integrated air straightener
• CNC-machined mass airflow (MAF) sensor housing retains stock calibration
• High-flow, fully serviceable oiled performance air filter with increased surface area
• Powder-coated wrinkle black finish on intake piping and heat shield
• True cold-air design with filter placement outside hot engine bay air
• Improved throttle response and richer induction sound under acceleration
• Dyno-proven gains up to 25 hp and 25 lb-ft of torque over stock
• Bolt-on installation that works with stock ECU without tuning
• Mishimoto Lifetime Warranty included

Specifications

• Part Number: MMAI-STI-08WBK
• Application: 2008-2014 Subaru WRX and WRX STI
• Engine: 2.5L EJ255/EJ257 turbocharged horizontally-opposed 4-cylinder
• Material: Powder-coated aluminum intake piping with heat-shielded filter placement
• Filter Type: High-flow, oiled reusable performance filter
• Filter Diameter: ~2.75"
• Installation: Direct bolt-on replacement intake
• Tuning Required: Not required on stock vehicles

Included Components

• 1x Mandrel-bent aluminum intake pipe with CNC-machined MAF housing
• 1x Wrinkle black powder-coated heat shield
• 1x High-flow oiled performance air filter
• 1x Silicone coupler
• 1x Rubber mounting isolator
• 2x Worm gear clamps
• Installation hardware and Mishimoto Lifetime Warranty documentation

Product Description

The Mishimoto MMAI-STI-08WBK Cold Air Intake Kit is a direct-fit performance upgrade designed for 2008-2014 Subaru WRX and WRX STI models equipped with the turbocharged 2.5 L flat-4 engine. This cold air intake replaces the restrictive factory intake system with mandrel-bent aluminum piping and a high-flow, serviceable oiled performance filter, improving airflow and enhancing throttle response while producing a richer induction sound during acceleration. Its true cold-air design positions the filter outside the engine bay to draw cooler air, helping maintain stronger performance across various driving conditions.

Finished with a wrinkle black powder coat for a refined under-hood appearance, the intake's integrated air straightener and precision CNC-machined MAF housing ensure accurate airflow readings and consistent power delivery. Installation is simple and completely bolt-on, and the system works with the stock ECU without requiring additional tuning, making it an ideal upgrade for street, autocross, or spirited driving applications. Backed by the Mishimoto Lifetime Warranty, this intake combines performance, durability, and long-term reliability for WRX/STI enthusiasts