-1%
AEM 2022 C.A.S. Subaru WRX H4-2.4L F/I Turbo Cold Air Intake - AEM Induction 21-891C
AEM 2022 C.A.S. Subaru WRX H4-2.4L F/I Turbo Cold Air Intake - AEM Induction 21-891C
AEM 2022 C.A.S. Subaru WRX H4-2.4L F/I Turbo Cold Air Intake - AEM Induction 21-891C
AEM 2022 C.A.S. Subaru WRX H4-2.4L F/I Turbo Cold Air Intake - AEM Induction 21-891C
AEM 2022 C.A.S. Subaru WRX H4-2.4L F/I Turbo Cold Air Intake - AEM Induction 21-891C
Click to zoom in

AEM 22-25 Subaru WRX 2.4L Turbo Cold Air Intake - Gunmetal

AEM Induction
AEM21-891C
024844396778
Cold Air Intakes
44 Units In Stock
$ 480.00 $ 471.99
$ 471.99

Product Overview

AEM Induction 21-891C is a cold-air intake for 2022–2025 WRX 2.4L turbo. Gunmetal gray aluminum tubing and an oil-free Dryflow filter replace the restrictive factory airbox arrangement. AEM reports an estimated gain of 9.23 HP @ 5643 RPM for its documented test configuration. Results are not guaranteed on every vehicle.

Key Features

  • Washable synthetic filter media without filter oil.
  • Application-specific airflow routing and heat shield.
  • Retains factory MAF equipment and the connections specified by the exact instructions.

Fitment

Years Vehicle Engine / application
2022–2025 Subaru WRX 2.4L turbo; exact manual
2026 Subaru WRX Current AEM finder only; exact trim/revision confirmation required

AEM’s current finder includes 2026, beyond the July 2025 manual. Confirm later years and individual trims against the exact kit revision before ordering.

Specifications

Detail Value
Brand AEM Induction
Manufacturer Part Number 21-891C
Tube / finish Gunmetal gray aluminum
Replacement filter 21-203DK
Condition New

What's Included

  • Filter, tube, one straight coupler and three clamps
  • MAF extension harness, heat shield/window pieces, brackets, trim, mounting posts, grommets and fasteners

Factory sensors and reused vehicle parts are not supplied as new replacements. Refer to the exact illustrated parts list for individual hardware.

About AEM Induction

AEM Induction develops vehicle-specific and universal intake, filtration, and supporting components for street and performance applications. Black Ops Auto Works organizes each listing by exact part number and available fitment data to support accurate product selection.

Related Parts

Frequently Asked Questions

What is the 21-891C?

The vehicle-specific intake described above; it is a complete intake configuration, not just a replacement filter.

Which applications are supported?

2022–2025 WRX 2.4L turbo; review the fitment notes before ordering.

Is the finish polished?

Gunmetal gray aluminum.

What replacement filter is listed?

21-203DK; verify the actual filter/kit revision before replacing it.

Is a new MAF sensor included?

The original vehicle sensor is reused; this is not a replacement sensor package.

Are the power gains guaranteed?

No. AEM’s published figures apply to its documented test configuration.

Does Dryflow require oil?

No. Follow the filter-specific cleaning procedure and inspect more frequently in dust.

What emissions conditions apply?

Current exact AEM page restricts California sale/use on pollution-controlled vehicles.

Installation Instructions

  1. Read the exact instructions, cool the engine and observe the battery-disconnection precautions.
  2. Transfer the original MAF, use the extension harness and fit the tube/coupler at the turbo inlet as illustrated. Reinstall the factory fresh-air duct after mounting the shield.
  3. Align the assembly and verify fasteners, sensor connections and hood clearance; perform the prescribed final inspection before driving.

AEM instructions and illustrated parts list

California Proposition 65 Warning

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.

AEM Induction

AEM Induction

Shop AEM Induction cold air intake systems, short ram intakes, Brute Force applications and DryFlow filters at Black Ops Auto Works. Choose a complete intake for an induction upgrade or a replacement filter to service an existing housing. The range also includes filter wraps, cleaner, tubing and supporting intake components.Choose Your AEM Intake SystemCold Air Intake SystemsAEM cold air systems use application-specific tubing and filter placement. Compare the intake layout, finish and components supplied for the exact engine and vehicle. A complete kit is a different project from changing the filter inside an existing airbox.Brute Force and Short Ram OptionsExplore Brute Force applications for the listed truck and SUV configurations, or a short ram design where the manufacturer offers one for your car. Routing, mounting and filter position distinguish these choices; use the system designed for the vehicle rather than combining parts by tube diameter alone.AEM DryFlow Filters and Se...

View AEM Induction Products
Air Intake Systems

Air Intake Systems

Shop cold air intakes, short ram intakes, enclosed air boxes, intake tubes, mass air flow sensors, snorkels, scoops, silicone couplers, replacement filters, and intake service components at Black Ops Auto Works. This collection covers complete vehicle-specific intake systems and supporting components for performance cars, trucks, SUVs, Jeeps, diesel vehicles, off-road builds, and custom fabrication projects. Performance Air Intake Systems and Components An engine air intake system filters incoming air and delivers it to the throttle body, turbocharger, or supercharger inlet. Aftermarket systems may change the intake path, filter location, tubing size, air-box design, induction sound, and airflow characteristics. The results depend on the exact vehicle, engine calibration, intake design, installed modifications, and operating conditions. This collection includes products from Legmaker Intakes, aFe POWER, JLT, K&N, AIRAID, CORSA Performance, Injen, Spectre, Granatelli, Vibrant Per...

View Air Intake Systems Products
Cold Air Intakes

Cold Air Intakes

Shop cold air intakes, short ram intakes, closed-airbox intake systems, replacement air filters, intake tubes, and MAF housings from K&N, AEM, aFe Power, Airaid, S&B Filters, Injen, Roush, Volant, Corsa, Mishimoto, HPS Performance, Cobb Tuning, JLT, Vararam, Steeda, and other performance intake brands. Find full open-element cold air intakes, sealed-airbox systems, dry and oiled air filters, replacement drop-in filter panels, MAF sensor housings, and complete intake tube kits. Cold air intakes for domestic muscle, sport-compact tuners, diesel trucks, off-road 4x4, Euro performance, and modern sport SUVs Mustang, Camaro, Challenger, Charger, F-150, Silverado, Ram, Tundra, Tacoma, 4Runner, Wrangler, Bronco, Cummins, Duramax, Power Stroke, WRX/STi, Civic Type R, GR86, Supra, GR Corolla, BMW M2/M3/M4, Golf R, and hundreds of additional platforms. Filter by vehicle, intake style (open element, closed airbox, short ram, tube kit), filter media (oiled cotton, dry synthetic), tun...

View Cold Air Intakes Products
Subaru WRX Parts and Accessories

Subaru WRX Parts and Accessories

Shop Subaru WRX parts for exhaust sound, cooling projects, brake maintenance and chassis work at Black Ops Auto Works. Explore AWE, HKS and Invidia exhaust references, GrimmSpeed intercooler or charge-pipe choices and drivetrain components. Plan a coordinated project for your exact WRX generation, engine and transmission.Exhaust Sound and Body-Specific StylingCompare cat-back, axle-back and single-exit references by supplied sections and full body coverage. AWE Touring, Track and conversion packages serve different purchases; a conversion requires the supported existing system. Seibon hood and carbon scoop references also need exact body and mounting application before choosing the exterior detail.Intercoolers, Charge Pipes and Engine CareGrimmSpeed intercooler titles distinguish earlier WRX applications from 2015–2021 references, with separate charge-pipe choices for later bodies. Match the actual engine, turbo connections and mating components. Boundary oil-pump gears, gaskets and...

View Subaru WRX Parts and Accessories Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×