Photo - Primary
Photo - Mounted
Photo - Mounted
Photo - Unmounted
Photo - Unmounted
User 4
Photo - Unmounted
User 4
Logo Image
Click to zoom in
  • Guaranteed Fitment

    Always the correct part

  • In-House Experts

    We know our products

  • Warranty

    Warranty claims support

  • Cheapest Delivery

    Best shipping options available

AEM Cold Air Intake System For Subaru WRX STI 2018 H4 2.5L F/I Wrinkle Red P/N 21-836WR

AEM Induction
AEM21-836WR
In stock
Cold Air Intakes
$349.99
AEM Cold Air Intake System For Subaru WRX STI 2018 H4 2.5L F/I Wrinkle Red P/N...
$349.99

customers are viewing this product
AEM Cold Air Intake System For Subaru WRX STI 2018 H4 2.5L F/I Wrinkle Red P/N 21-836WR

AEM Cold Air Intake System For Subaru WRX STI 2018 H4 2.5L F/I Wrinkle Red P/N 21-836WR

The AEM 21-836WR Performance Cold Air Intake System is engineered to deliver increased horsepower and torque by replacing the restrictive factory air filter and intake housing on the 2018 Subaru WRX STI. This intake system has been specifically designed, tuned, and dyno-tested for optimal fit and performance on this model. Air flows through an oversized AEM Dryflow synthetic washable air filter, providing superior airflow, filtration, and performance. The air filter fits into the original air box location and is shielded by a heat shield that reduces intake air temperature, helping to maximize horsepower gains.

The intake tube is mandrel-bent aluminum finished with a durable textured wrinkle red powder coating for enhanced durability and style. This system is designed to work seamlessly with the engineƒ??s factory emissions control components, including the mass airflow sensor. The tapered cylinder-shaped AEM Dryflow filter uses oil-free synthetic media, requiring cleaning only every 100,000 miles under normal driving conditions. Installation is straightforward with commonly available tools. The system is backed by AEMƒ??s Lifetime Limited Warranty.

Please note, some AEM intakes are not legal for sale or use in California and other states that follow California emission regulations. Check the specific vehicle applications for legal status.

Key Features

  • Vehicle Fit: Designed for 2018 Subaru WRX STI 2.5L H4 F/I

  • Filter: Oversized AEM Dryflow synthetic washable air filter

  • Filter Media: Oil-free synthetic, washable up to 100,000 miles

  • Intake Tube: Mandrel-bent aluminum with textured wrinkle red powder coat

  • Heat Shield: Custom design to reduce intake air temperature

  • Emissions Compatible: Works with factory emissions controls including MAF sensor

  • Warranty: AEM Lifetime Limited Warranty

  • Legal: Some restrictions in California and similar states

Specifications

Specification Details
Part Number 21-836WR
Vehicle Application Subaru WRX STI 2018
Engine 2.5L Inline 4 Fuel Injected
Intake Tube Material Mandrel-bent aluminum
Finish Textured wrinkle red powder coat
Air Filter Type AEM Dryflow synthetic washable filter
Filter Media Oil-free synthetic
Cleaning Interval Up to 100,000 miles (varies with conditions)
Warranty Lifetime Limited Warranty


Technical Drawing
Installation Instructions
Installation Instructions

This Part Fits:

Year Make Model Submodel
2018 Subaru WRX STI Base
2018 Subaru WRX STI Limited
2018 Subaru WRX STI Type RA
Read More
Read Less
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.

Your cart

×