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  • AEM Cold Air Intake System For Subaru WRX STI 2019-2021 2.5L Wrinkle Red P/N 21-863WR
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AEM Cold Air Intake System For Subaru WRX STI 2019-2021 2.5L Wrinkle Red P/N 21-863WR

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AEM Cold Air Intake System For Subaru WRX STI 2019-2021 2.5L Wrinkle Red P/N 21-863WR
Description

AEM Cold Air Intake System for Subaru WRX STI 2019ƒ??2021 2.5L Wrinkle Red

This AEM Cold Air Intake System is designed for Subaru WRX STI models from 2019 to 2021 equipped with a 2.5L engine. The system replaces the factory air intake components with a mandrel-bent aluminum intake tube finished in wrinkle red, an oversized AEM DRYFLOW synthetic washable air filter, and high-quality hardware. The conical filter is engineered for up to 100,000 miles of service under normal highway driving conditions. A custom heat shield is included to protect intake air from engine bay heat, and the factory fresh air duct attaches directly to the heat shield. Installation generally takes less than 90 minutes. Emissions compliance varies by region; refer to product specifications for CARB status.

Key Features

  • Fitment: Subaru WRX STI (2019ƒ??2021) with 2.5L engine

  • Intake Tube: Mandrel-bent aluminum with wrinkle red finish

  • Filter Type: Oversized AEM DRYFLOW synthetic washable air filter (oil-free)

  • Filter Design: Conical shape for improved airflow and filtration

  • Filter Service Interval: Up to 100,000 miles under normal highway driving

  • Heat Shield: Custom heat shield included to reduce intake air temperature

  • Fresh Air Duct: Factory fresh air duct attaches to heat shield

  • Installation Time: Typically under 90 minutes

  • Emissions Compliance: Not legal in California and states with similar regulations (check CARB status)

Specifications

Specification Details
Brand AEM
Part Number 21-863WR
Vehicle Fitment Subaru WRX STI (2019ƒ??2021)
Engine Compatibility 2.5L L4
Intake Tube Material Mandrel-Bent Aluminum (Wrinkle Red Finish)
Filter Type AEM DRYFLOW Synthetic (Oil-free, Washable & Reusable)
Filter Shape Oversized Conical
Heat Shield Custom Heat Shield Included
Fresh Air Duct Factory duct attaches to heat shield
Filter Maintenance Up to 100,000 miles before cleaning
Installation Bolt-on with included hardware


User 1
Installation Instructions
Installation Instructions

This Part Fits:

Year Make Model Submodel
2019-2021 Subaru WRX STI Base
2019-2021 Subaru WRX STI Limited
2019 Subaru WRX STI S209
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Effective Date: October 2024
We offer a 30-day return policy, allowing you to request a return within 30 days of receiving your item. To qualify for a return, the item must be in its original condition—unused, with tags, and in its original packaging. A receipt or proof of purchase is also required.

To initiate a return, please contact us at info@riotparts.com. Returns must be shipped to the address provided upon request. If your return is approved, we will issue a return shipping label along with detailed instructions.

Important
Returns sent without prior authorization will not be accepted.

For any return-related inquiries, please reach out to us at info@riotparts.com.

Return Shipping Address
The return shipping address will be determined based on the requestor’s location to ensure the nearest return facility is used.

Possible return locations include:
• 10880 Lear Blvd.
Reno, NV 89506, United States
• 931 W. Bardin Rd., Suite 150–200
Arlington, TX 76017, United States
• 3035 Campus Dr.
Hatfield, PA 19440, United States
• 5789 N. Graham Road, Ste 200
Whiteland, IN 46184, United States
• 2020 NE Aloclek Dr 4711 N Lamon Ave
#118 STE 12, Hillsboro, OR 97124, United States

Damages and Issues
We recommend inspecting your order upon receipt. If you find that an item is defective, damaged, or if you received the wrong item, please contact us immediately so we can address the issue.

Exceptions / Non-Returnable Items
Certain items cannot be returned, including:
• Electrical parts that have been installed or used
• Special order parts that were custom ordered for you
• Items that have been damaged due to improper installation or use

If you have questions or concerns about a specific item, please contact us for assistance.

Exchanges
For exchanges, the quickest option is to return the item you have. Once the return is accepted, you can make a separate purchase for the new item.

Refunds
We will notify you once we receive and inspect your return to inform you whether your refund is approved. If approved, you will be automatically refunded using your original payment method within 10 business days. Please be aware that it may take additional time for your bank or credit card company to process and post the refund.

If more than 15 business days have passed since your return was approved and you haven’t received your refund, please contact us at info@riotparts.com.

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