AEM Induction Cold Air Intake System — Fits 2019-2021 Subaru WRX STI 2.5L

SKU: AEM21-863C
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About AEM Induction AEM Induction engineers high-quality automotive parts and ...Read More

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Sale price$268.26
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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.

Watch in action

Elevate Your Subaru WRX STI's Performance with AEM Induction Cold Air Intake (2019-2021)

Unleash the full potential of your 2019-2021 Subaru WRX STI 2.5L with the AEM Induction 21-863C Cold Air Intake system. Engineered to deliver significant horsepower and torque gains, this intake replaces your restrictive factory air filter and intake housing, allowing your engine to breathe easier and perform at its peak. Designed, tuned, and dyno-tested for your specific WRX STI model, this system ensures optimal performance and reliability.

Experience the AEM Difference:

  • Enhanced Power Output: Achieve measurable increases in horsepower and torque for a more thrilling driving experience.
  • High-Flow AEM Dryflow Filter: Features an oversized, conical Dryflow synthetic washable air filter that provides exceptional airflow, superior filtration, and can last up to 100,000 miles between services under normal highway conditions.
  • Mandrel-Bent Aluminum Tubing: The intake tube is constructed from high-quality, mandrel-bent aluminum for smooth airflow and durability.
  • Effective Heat Shield: A custom heat shield is included to isolate the intake air from engine bay heat, ensuring cooler, denser air enters the engine for maximum power.
  • Factory Duct Integration: The system is designed to integrate with your vehicle's factory fresh air duct for optimal air delivery.
  • Quick Installation: Most systems can be installed in under 90 minutes, providing a straightforward performance upgrade.

This AEM Cold Air Intake is the perfect upgrade for WRX STI enthusiasts seeking improved throttle response, a more aggressive engine note, and overall enhanced performance. Ensure your 2019, 2020, or 2021 Subaru WRX STI performs at its best with this premium intake from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2019 Subaru WRX STI S209
2019-2021 Subaru WRX STI Base
2019-2021 Subaru 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.

Watch in action

Elevate Your Subaru WRX STI's Performance with AEM Induction Cold Air Intake (2019-2021)

Unleash the full potential of your 2019-2021 Subaru WRX STI 2.5L with the AEM Induction 21-863C Cold Air Intake system. Engineered to deliver significant horsepower and torque gains, this intake replaces your restrictive factory air filter and intake housing, allowing your engine to breathe easier and perform at its peak. Designed, tuned, and dyno-tested for your specific WRX STI model, this system ensures optimal performance and reliability.

Experience the AEM Difference:

  • Enhanced Power Output: Achieve measurable increases in horsepower and torque for a more thrilling driving experience.
  • High-Flow AEM Dryflow Filter: Features an oversized, conical Dryflow synthetic washable air filter that provides exceptional airflow, superior filtration, and can last up to 100,000 miles between services under normal highway conditions.
  • Mandrel-Bent Aluminum Tubing: The intake tube is constructed from high-quality, mandrel-bent aluminum for smooth airflow and durability.
  • Effective Heat Shield: A custom heat shield is included to isolate the intake air from engine bay heat, ensuring cooler, denser air enters the engine for maximum power.
  • Factory Duct Integration: The system is designed to integrate with your vehicle's factory fresh air duct for optimal air delivery.
  • Quick Installation: Most systems can be installed in under 90 minutes, providing a straightforward performance upgrade.

This AEM Cold Air Intake is the perfect upgrade for WRX STI enthusiasts seeking improved throttle response, a more aggressive engine note, and overall enhanced performance. Ensure your 2019, 2020, or 2021 Subaru WRX STI performs at its best with this premium intake from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2019 Subaru WRX STI S209
2019-2021 Subaru WRX STI Base
2019-2021 Subaru 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.

Watch in action

Elevate Your Subaru WRX STI's Performance with AEM Induction Cold Air Intake (2019-2021)

Unleash the full potential of your 2019-2021 Subaru WRX STI 2.5L with the AEM Induction 21-863C Cold Air Intake system. Engineered to deliver significant horsepower and torque gains, this intake replaces your restrictive factory air filter and intake housing, allowing your engine to breathe easier and perform at its peak. Designed, tuned, and dyno-tested for your specific WRX STI model, this system ensures optimal performance and reliability.

Experience the AEM Difference:

  • Enhanced Power Output: Achieve measurable increases in horsepower and torque for a more thrilling driving experience.
  • High-Flow AEM Dryflow Filter: Features an oversized, conical Dryflow synthetic washable air filter that provides exceptional airflow, superior filtration, and can last up to 100,000 miles between services under normal highway conditions.
  • Mandrel-Bent Aluminum Tubing: The intake tube is constructed from high-quality, mandrel-bent aluminum for smooth airflow and durability.
  • Effective Heat Shield: A custom heat shield is included to isolate the intake air from engine bay heat, ensuring cooler, denser air enters the engine for maximum power.
  • Factory Duct Integration: The system is designed to integrate with your vehicle's factory fresh air duct for optimal air delivery.
  • Quick Installation: Most systems can be installed in under 90 minutes, providing a straightforward performance upgrade.

This AEM Cold Air Intake is the perfect upgrade for WRX STI enthusiasts seeking improved throttle response, a more aggressive engine note, and overall enhanced performance. Ensure your 2019, 2020, or 2021 Subaru WRX STI performs at its best with this premium intake from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2019 Subaru WRX STI S209
2019-2021 Subaru WRX STI Base
2019-2021 Subaru WRX STI Limited

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