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AEM Cold Air Intake System - Subaru STI 2019+
AEM Cold Air Intake System - Subaru STI 2019+
AEM Cold Air Intake System - Subaru STI 2019+

AEM Cold Air Intake System

Subaru STI 2019+

Was: $479.99
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Features & Product Details

RallySport Direct is proud to provide you with another quality performance intake system brought to you by AEM.


Here, you are looking at the AEM Cold Air Intake System designed specifically for your application to replace the factory restrictive intake system to increase both power and performance. This is a complete kit that replaces your factory air filter and air intake housing and has been dyno-proven to produce more power and torque.






  • Tuned and dyno-tested to improve acceleration and engine sound
  • Low restriction aluminum intake pipe
  • Intake pipe will come powder-coated a wrinkle red color
  • Air filter can last up to 100,000 miles before cleaning is required
  • Air filter is washable and reusable
  • Increased horsepower
  • Improved throttle response
  • Improved torque
  • Reduced turbo lag
  • Increased intake sound
  • Includes heat shield
  • Includes new clamps
  • Specifications

    Brand: AEM Electronics
    Carb Exempt: [

    Carb Restricted Shipping

    If an Item is CARB exempt it means that it has undergone an engineering evaluation by CARB (California Air Recourses Board) and is shown to not increase vehicle emissions. If an item is CARB Exempt it will have an EO (Executive Order) number associated with it. Even if an item has an EO number it is not guaranteed to be CARB exempt for your vehicle. It is important to confirm that your Year Make and Model fall under the CARB EO number associated with the part. That can be confirmed either by checking the CARB website or the manufacturers website.
    ? ]
    Filter Color: Red
    Filter Element Type: Dry
    Filter Material: Cotton
    Filter Reusable: Yes
    Includes Airbox: Yes
    Piping Color: Red
    Piping Material: Aluminum
    Tuning Required: No, but recommended
    Mfgr. Warranty: Limited Lifetime
    Condition: New Product
    Return Policy:
    WARNING: Cancer and Reproductive Harm -



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    • Q: Difference in this one Vs. Other AEM CAI  Vangy2 years ago

      I notice that there's 2 options for the 2020 STI. This one and the other one. The heat shield design is different. Can you chime in as in to why they are?
      • 0 of 0 people found the following answer helpful

        A:  It looks like we may need to update these part numbers, this part number (AEM21-863WR) is for the 2019-2020 STI, the other option (AEM21-836WR) is for 2018 only. I'm not sure why AEM has a product for one model year only though, and the part numbers are really close, adding in to the confusion.

        Lane H. @ RallySport Direct 2 years ago  
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    • Q: MAF  silver19STI2 years ago

      does this system have a mass air flow sensor location and you just cant see it in the pictures? or would I have to run with no MAF?
    • Q: Fitment  Aaron S2 years ago

      Will this fit front mount setups if you don’t use the heat shield?
      • 0 of 0 people found the following answer helpful

        A:  We have not tested to confirm and I'm not able to find anyone using this intake with a front mount. We can't say for certain, but chances are your FMIC manufacturer also sells an intake that would work.

        Lane H. @ RallySport Direct 2 years ago  
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    • Q: AEM Cold Air  CHouck 3 years ago

      Any change from 19-20 that wouldn’t make this work?
    • Q: AEM Cold Air Intake  JD3 years ago

      Hi, Is there a difference between the Subaru Sit 2018 and 2019 AEM Cold air intake system?
      • 1 of 1 people found the following answer helpful

        A:  Yes I believe that there is a slight difference in the intake design

        Tylo R @ RallySport Direct
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      • 0 of 0 people found the following answer helpful

        A:  I tried to fit the 2018 Cold Air on my '19. The front air duct doesnt fit, and the heatshield has to be kinda warped to fit and comes in contact with the maf pipe.

        Was this answer helpful?