AEM 21-478WR Cold Air Intake System - Textured Red — Fits 2008-2014 Subaru WRX/STI

SKU: AEM21-478WR
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Sale price$375.56
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About AEM Induction

AEM Induction engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full AEM Induction lineup with fast shipping and expert fitment support — order with confidence.

AEM 21-478WR Performance Cold Air Intake System

Inject vibrant style and potent performance into your 2008-2014 Subaru WRX and WRX STI with the AEM 21-478WR Cold Air Intake System. This performance-driven upgrade is designed to significantly boost horsepower and torque by optimizing your engine's air intake. Featuring a striking textured red powder-coated finish on its mandrel-bent aluminum tubing, this system not only enhances performance but also adds a custom look under the hood.

Unleash Your Subaru's Potential:

  • Horsepower & Torque Gains: Engineered for maximum airflow, this intake delivers measurable increases in power and responsiveness.
  • Oversized Dryflow Air Filter: Utilizes an AEM Dryflow synthetic washable air filter, renowned for its excellent airflow, superior filtration efficiency, and extended service intervals (up to 100,000 miles in normal highway use).
  • Strategic Filter Placement: The air filter is positioned within the original air box space and protected by a heat shield, effectively reducing intake air temperatures and maximizing power.
  • Durable & Stylish Tubing: Constructed from mandrel-bent aluminum with a durable textured red powder-coated finish, ensuring both longevity and a standout appearance.
  • Designed for Fitment: Tuned and dyno-tested for specific Subaru WRX, WRX STI, Impreza WRX, and Impreza WRX STI models, ensuring a proper fit and optimal function.
  • CARB Legal: This intake system is CARB EO D-670-21 compliant, making it legal for sale and use in California and other states adhering to CARB emissions standards.

The AEM 21-478WR is the perfect choice for Subaru enthusiasts looking to enhance both the performance and aesthetics of their vehicle. Experience improved throttle response and a more aggressive engine note.

Upgrade your Subaru's breathing system with this eye-catching intake. Find the AEM 21-478WR Textured Red Cold Air Intake at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2008-2014 Subaru Impreza WRX
2008-2014 Subaru Impreza WRX STI
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2010-2014 Subaru Impreza WRX Limited
2011 Subaru Impreza 2.5i
2011 Subaru Impreza 2.5i Premium
2011 Subaru Impreza Outback Sport

Product Details

Product Description
Part Numbers
Sizing & Fit

About AEM Induction

AEM Induction engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full AEM Induction lineup with fast shipping and expert fitment support — order with confidence.

AEM 21-478WR Performance Cold Air Intake System

Inject vibrant style and potent performance into your 2008-2014 Subaru WRX and WRX STI with the AEM 21-478WR Cold Air Intake System. This performance-driven upgrade is designed to significantly boost horsepower and torque by optimizing your engine's air intake. Featuring a striking textured red powder-coated finish on its mandrel-bent aluminum tubing, this system not only enhances performance but also adds a custom look under the hood.

Unleash Your Subaru's Potential:

  • Horsepower & Torque Gains: Engineered for maximum airflow, this intake delivers measurable increases in power and responsiveness.
  • Oversized Dryflow Air Filter: Utilizes an AEM Dryflow synthetic washable air filter, renowned for its excellent airflow, superior filtration efficiency, and extended service intervals (up to 100,000 miles in normal highway use).
  • Strategic Filter Placement: The air filter is positioned within the original air box space and protected by a heat shield, effectively reducing intake air temperatures and maximizing power.
  • Durable & Stylish Tubing: Constructed from mandrel-bent aluminum with a durable textured red powder-coated finish, ensuring both longevity and a standout appearance.
  • Designed for Fitment: Tuned and dyno-tested for specific Subaru WRX, WRX STI, Impreza WRX, and Impreza WRX STI models, ensuring a proper fit and optimal function.
  • CARB Legal: This intake system is CARB EO D-670-21 compliant, making it legal for sale and use in California and other states adhering to CARB emissions standards.

The AEM 21-478WR is the perfect choice for Subaru enthusiasts looking to enhance both the performance and aesthetics of their vehicle. Experience improved throttle response and a more aggressive engine note.

Upgrade your Subaru's breathing system with this eye-catching intake. Find the AEM 21-478WR Textured Red Cold Air Intake at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2008-2014 Subaru Impreza WRX
2008-2014 Subaru Impreza WRX STI
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2010-2014 Subaru Impreza WRX Limited
2011 Subaru Impreza 2.5i
2011 Subaru Impreza 2.5i Premium
2011 Subaru Impreza Outback Sport

Product Details

Product Description

About AEM Induction

AEM Induction engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full AEM Induction lineup with fast shipping and expert fitment support — order with confidence.

AEM 21-478WR Performance Cold Air Intake System

Inject vibrant style and potent performance into your 2008-2014 Subaru WRX and WRX STI with the AEM 21-478WR Cold Air Intake System. This performance-driven upgrade is designed to significantly boost horsepower and torque by optimizing your engine's air intake. Featuring a striking textured red powder-coated finish on its mandrel-bent aluminum tubing, this system not only enhances performance but also adds a custom look under the hood.

Unleash Your Subaru's Potential:

  • Horsepower & Torque Gains: Engineered for maximum airflow, this intake delivers measurable increases in power and responsiveness.
  • Oversized Dryflow Air Filter: Utilizes an AEM Dryflow synthetic washable air filter, renowned for its excellent airflow, superior filtration efficiency, and extended service intervals (up to 100,000 miles in normal highway use).
  • Strategic Filter Placement: The air filter is positioned within the original air box space and protected by a heat shield, effectively reducing intake air temperatures and maximizing power.
  • Durable & Stylish Tubing: Constructed from mandrel-bent aluminum with a durable textured red powder-coated finish, ensuring both longevity and a standout appearance.
  • Designed for Fitment: Tuned and dyno-tested for specific Subaru WRX, WRX STI, Impreza WRX, and Impreza WRX STI models, ensuring a proper fit and optimal function.
  • CARB Legal: This intake system is CARB EO D-670-21 compliant, making it legal for sale and use in California and other states adhering to CARB emissions standards.

The AEM 21-478WR is the perfect choice for Subaru enthusiasts looking to enhance both the performance and aesthetics of their vehicle. Experience improved throttle response and a more aggressive engine note.

Upgrade your Subaru's breathing system with this eye-catching intake. Find the AEM 21-478WR Textured Red Cold Air Intake at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2008-2014 Subaru Impreza WRX
2008-2014 Subaru Impreza WRX STI
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2010-2014 Subaru Impreza WRX Limited
2011 Subaru Impreza 2.5i
2011 Subaru Impreza 2.5i Premium
2011 Subaru Impreza Outback Sport

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