AEM 21-477C Cold Air Intake System - Silver — Fits 2004-2007 Subaru WRX/STI, 2004-2005 Forester XT, 2006 Saab 9-2X

SKU: AEM21-477C
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Sale price$399.99
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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 21-477C Performance Cold Air Intake System

Unleash the hidden power of your Subaru WRX/WRX STI, Forester Turbo, or SAAB 9-2X with the AEM 21-477C Performance Cold Air Intake System. Engineered to deliver significant horsepower and torque gains, this intake replaces your restrictive factory air filter and housing with a high-flow, performance-driven setup. Designed, tuned, and dyno-tested for a precise fitment on 2006-2007 Subaru Impreza WRX/WRX STI, 2004-2005 Subaru Forester XT, and 2006 Saab 9-2X models, this system is your gateway to enhanced engine performance.

Key Features and Benefits:

  • Increased Horsepower & Torque: Optimized airflow design results in measurable power gains across the RPM range.
  • High-Flow Dryflow Air Filter: Features an oversized AEM Dryflow synthetic washable air filter, ensuring superior airflow, excellent filtration, and long-lasting performance.
  • Reduced Intake Air Temperature: The air filter is strategically relocated to the passenger-side wheel well, drawing in cooler ambient air to maximize density and power output.
  • Mandrel-Bent Aluminum Tubing: Constructed from durable, mandrel-bent aluminum tubing with a sleek gunmetal gray powder-coated finish for a stealthy look and lasting durability.
  • Emissions Compliance: Designed to accommodate the vehicle's factory emissions control devices, ensuring compliance.
  • CARB Legal: This intake system is CARB EO D-670-15 compliant, making it legal for use in California and other states adopting CARB standards.

Upgrade your vehicle's induction system with the AEM 21-477C and experience a noticeable improvement in throttle response and overall engine performance. This intake is built to last and designed for enthusiasts seeking the best for their Subaru or Saab.

Discover the difference quality engineering makes. Get your AEM 21-477C Cold Air Intake today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2006 Saab 9-2X 2.5i
2006 Saab 9-2X Aero
2004-2005 Subaru Forester XT
2005 Subaru Forester XT Premium
2004-2007 Subaru Impreza WRX STI
2006-2007 Subaru Impreza WRX
2006-2007 Subaru Impreza WRX Limited
2007 Subaru Impreza WRX STI Limited

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 21-477C Performance Cold Air Intake System

Unleash the hidden power of your Subaru WRX/WRX STI, Forester Turbo, or SAAB 9-2X with the AEM 21-477C Performance Cold Air Intake System. Engineered to deliver significant horsepower and torque gains, this intake replaces your restrictive factory air filter and housing with a high-flow, performance-driven setup. Designed, tuned, and dyno-tested for a precise fitment on 2006-2007 Subaru Impreza WRX/WRX STI, 2004-2005 Subaru Forester XT, and 2006 Saab 9-2X models, this system is your gateway to enhanced engine performance.

Key Features and Benefits:

  • Increased Horsepower & Torque: Optimized airflow design results in measurable power gains across the RPM range.
  • High-Flow Dryflow Air Filter: Features an oversized AEM Dryflow synthetic washable air filter, ensuring superior airflow, excellent filtration, and long-lasting performance.
  • Reduced Intake Air Temperature: The air filter is strategically relocated to the passenger-side wheel well, drawing in cooler ambient air to maximize density and power output.
  • Mandrel-Bent Aluminum Tubing: Constructed from durable, mandrel-bent aluminum tubing with a sleek gunmetal gray powder-coated finish for a stealthy look and lasting durability.
  • Emissions Compliance: Designed to accommodate the vehicle's factory emissions control devices, ensuring compliance.
  • CARB Legal: This intake system is CARB EO D-670-15 compliant, making it legal for use in California and other states adopting CARB standards.

Upgrade your vehicle's induction system with the AEM 21-477C and experience a noticeable improvement in throttle response and overall engine performance. This intake is built to last and designed for enthusiasts seeking the best for their Subaru or Saab.

Discover the difference quality engineering makes. Get your AEM 21-477C Cold Air Intake today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2006 Saab 9-2X 2.5i
2006 Saab 9-2X Aero
2004-2005 Subaru Forester XT
2005 Subaru Forester XT Premium
2004-2007 Subaru Impreza WRX STI
2006-2007 Subaru Impreza WRX
2006-2007 Subaru Impreza WRX Limited
2007 Subaru Impreza WRX STI Limited

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 21-477C Performance Cold Air Intake System

Unleash the hidden power of your Subaru WRX/WRX STI, Forester Turbo, or SAAB 9-2X with the AEM 21-477C Performance Cold Air Intake System. Engineered to deliver significant horsepower and torque gains, this intake replaces your restrictive factory air filter and housing with a high-flow, performance-driven setup. Designed, tuned, and dyno-tested for a precise fitment on 2006-2007 Subaru Impreza WRX/WRX STI, 2004-2005 Subaru Forester XT, and 2006 Saab 9-2X models, this system is your gateway to enhanced engine performance.

Key Features and Benefits:

  • Increased Horsepower & Torque: Optimized airflow design results in measurable power gains across the RPM range.
  • High-Flow Dryflow Air Filter: Features an oversized AEM Dryflow synthetic washable air filter, ensuring superior airflow, excellent filtration, and long-lasting performance.
  • Reduced Intake Air Temperature: The air filter is strategically relocated to the passenger-side wheel well, drawing in cooler ambient air to maximize density and power output.
  • Mandrel-Bent Aluminum Tubing: Constructed from durable, mandrel-bent aluminum tubing with a sleek gunmetal gray powder-coated finish for a stealthy look and lasting durability.
  • Emissions Compliance: Designed to accommodate the vehicle's factory emissions control devices, ensuring compliance.
  • CARB Legal: This intake system is CARB EO D-670-15 compliant, making it legal for use in California and other states adopting CARB standards.

Upgrade your vehicle's induction system with the AEM 21-477C and experience a noticeable improvement in throttle response and overall engine performance. This intake is built to last and designed for enthusiasts seeking the best for their Subaru or Saab.

Discover the difference quality engineering makes. Get your AEM 21-477C Cold Air Intake today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2006 Saab 9-2X 2.5i
2006 Saab 9-2X Aero
2004-2005 Subaru Forester XT
2005 Subaru Forester XT Premium
2004-2007 Subaru Impreza WRX STI
2006-2007 Subaru Impreza WRX
2006-2007 Subaru Impreza WRX Limited
2007 Subaru Impreza WRX STI Limited

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