AEM Induction 21-863WR Cold Air Intake for 2019-2021 Subaru WRX STI 2.5L – Wrinkle Red

AEM cold air intake systems are designed to increase horsepower and torque. The system includes an oversized AEM DRYFLOW synthetic washable air filter, engineered to provide outstanding airflow, filtration, and performance, and also features a mandrel-bent aluminum intake tube and high quality hardware. The oversized, conical filter design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A custom heat shield helps protect intake air from the high temperature of your engine bay, and the factory fresh air duct attaches to the heat shield. The entire system can typically be installed in less than 90 minutes. Some intakes are not legal for sale or use on any pollution controlled motor vehicle in California. See the product specifications for CARB status on each part for a specific vehicle. AEM's mandrel-bent aluminum cold air intake systems are guaranteed to provide an increase in horsepower and torque, and are protected by the AEM Lifetime Limited Warranty. Associated products: AEM-21-2157DK DryFlow Air Filter, AEM-1-1000 Air Filter Cleaner

• Utilizes washable, reusable, oil-free synthetic filter media that preserves airflow efficiency, traps harmful contaminants, and provides long-term value over disposable filters.
• Typical Installation Can Be Completed In 90 Minutes Or Less

Upgrade the airflow and performance of your 2019-2021 Subaru WRX STI 2.5L with the AEM Induction 21-863WR Cold Air Intake. Designed to increase horsepower and torque, this system combines a mandrel-bent aluminum intake tube with an oversized AEM DRYFLOW synthetic air filter for efficient airflow, reliable filtration, and long-term serviceability. The wrinkle red finish adds a distinctive appearance to the engine compartment while maintaining AEM’s focus on functional performance.

The washable, reusable, oil-free AEM DRYFLOW filter is engineered to trap harmful contaminants without sacrificing airflow efficiency. Under normal highway driving conditions, its oversized conical design can allow service intervals of up to 100,000 miles. A custom heat shield helps reduce exposure to high engine-bay temperatures, and the factory fresh-air duct connects directly to the shield to support cooler intake air. Installation can typically be completed in 90 minutes or less using the included high-quality hardware.

Key Product Specifications & Technical Data

• Brand: AEM Induction
• Part Number: 21-863WR
• Application: Cold air intake system
• Vehicle Fitment: 2019-2021 Subaru WRX STI with 2.5L engine
• Filter Type: Washable, reusable, oil-free synthetic DRYFLOW filter
• Intake Tube Material: Mandrel-bent aluminum
• Finish: Wrinkle red
• Emissions Status: EPA compliant; CARB Executive Order D-670-25

What’s Included

• Mandrel-bent aluminum intake tube
• AEM DRYFLOW synthetic air filter
• Custom heat shield
• Installation hardware
• Factory fresh-air duct connection components

The AEM Induction 21-863WR is backed by AEM’s Lifetime Limited Warranty and is intended for the listed Subaru WRX STI applications. Replacement and service accessories include the AEM 21-2157DK DRYFLOW Air Filter and AEM 1-1000 Air Filter Cleaner.

Features:

• Increased Horsepower and Torque: Designed to improve engine airflow for stronger performance potential.
• DRYFLOW Synthetic Filter: Washable, reusable, and oil-free filter media helps preserve airflow efficiency while trapping harmful contaminants.
• Extended Filter Service: Oversized conical filter design can support service intervals of up to 100,000 miles under normal highway driving conditions.
• Heat Shielded Intake Path: Custom heat shield helps protect incoming air from high engine-bay temperatures while connecting to the factory fresh-air duct.
• Mandrel-Bent Aluminum Tube: Smooth aluminum intake tubing supports efficient airflow and provides durable performance.
• Quick Installation: System can typically be installed in 90 minutes or less with high-quality included hardware.
• Emissions Compliant: EPA compliant and covered by CARB Executive Order D-670-25 for applicable vehicle use.
• Lifetime Limited Warranty: Protected by AEM’s Lifetime Limited Warranty.

Fitments:
2019 Subaru WRX STI Base
2019 Subaru WRX STI Limited
2019 Subaru WRX STI S209
2020 Subaru WRX STI Base
2020 Subaru WRX STI Limited
2021 Subaru WRX STI Base
2021 Subaru WRX STI Limited

Air Freight Prohibited: false
Not Carb Approved: false
Carb Eo Number: D-670-25
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: Compliant
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1