Description
The Mishimoto MMAI-STI-15WRD Cold Air Intake System in Wrinkle Red is designed to deliver proven performance gains, enhanced airflow, and a deeper, more aggressive induction sound for the 2015–2017 Subaru WRX STI. Engineered specifically for the EJ257 platform, this intake replaces the restrictive factory airbox with a high-flow system that works safely with the stock ECU tune.
Extensive testing and development allow this intake to produce dyno-proven increases of up to 20 whp and 18 wtq. The mandrel-bent aluminum intake pipe provides smooth airflow, while the CNC-machined MAF housing and integrated air straightener ensure accurate sensor readings and consistent power delivery across the RPM range.
To help maintain lower intake temperatures, the oiled high-flow air filter is positioned outside the engine bay, and the included heat shield prevents heat-soak. The washable, reusable air filter offers 16% more surface area for increased airflow and filtration efficiency. The wrinkle red finish adds a bold visual upgrade to the STI engine bay, while the included sound generator cap cleans up the factory intake routing.
This kit installs in under an hour using basic tools and includes all necessary hardware, couplers, and mounting components. Designed in Delaware and supported by the Mishimoto Lifetime Warranty, this intake is a reliable, high-quality performance upgrade.
Key Features and Benefits
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Direct fit for 2015–2017 Subaru WRX STI
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Dyno-proven gains: up to 20 whp / 18 wtq
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Wrinkle Red mandrel-bent aluminum intake pipe
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CNC-machined MAF housing for accurate readings
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Integrated air straightener for smooth airflow across the MAF
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Designed to maintain safe air/fuel ratios on the stock tune
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Heat shield reduces intake air temperatures
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High-flow, serviceable oiled air filter with 16% more surface area
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Includes silicone coupler and all required installation hardware
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Sound symposer delete cap included
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Aggressive intake tone under throttle
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Installs in under one hour
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Designed in Delaware, USA; filter made in the USA
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Mishimoto Lifetime Warranty
Package Contents
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(1) Red Aluminum Intake Pipe
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(1) High-Flow Oiled Air Filter
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(1) Heat Shield with Protective Edging
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(1) Silicone Coupler
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(1) Rubber Mounting Isolator
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(1) Sound Generator Cap
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Hardware
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Mishimoto Lifetime Warranty
Technical Specs / Material Info
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Intake Pipe Material: Mandrel-bent aluminum
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Finish: Wrinkle Red
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Filter Type: Oiled, serviceable
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Max Gains: 20 whp / 18 wtq
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Tuning Required: No
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Warranty: Mishimoto Lifetime Warranty
Installation Info
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Direct bolt-on system
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Installs in ~1 hour
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Works with stock ECU calibration
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Includes all clamps, hardware, and mounts
Special Notes / Emissions Info
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Not CARB exempt
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Not legal for sale or use in California
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Fits 2015–2017 Subaru WRX STI (EJ257 engine) only
