AEM Cold Air Intake Red

MODEL # AEM 21-735WR
Manufacturer Part # 21-735WR


MSRP: $437.89

In stock! Ships same day
Qualifies for free shipping!

AEM Intake Systems are designed to increase horsepower and torque gains as well as better engine sound when used as a replacement for the factory airbox and air filter. AEM intake systems are designed, tuned, and dyno-tested for vehicle specific applications.

These kits include an oversized AEM Dryflow synthetic washable air filter for optimum air flow, filtration, and performance while allowing easy oil-free cleaning. AEM intake systems use mandrel-bent aluminum intake tubes, and high quality hardware designed to reduce restriction and reduce intake temperature.
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Brand: AEM
Carb Exempt: Yes
Carb E.O. Number: D670-18
Filter Color: Red
Filter Element Type: Dry
Filter Material: Cotton
Filter Reusable: Yes
Includes Airbox: Yes
Piping Color: Red
Piping Material: Aluminum
Tuning Required: Yes

Mfgr. Warranty: Limited Lifetime Warranty
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.



Great Intake!
anthonyjcarlino49695 1 year ago
High quality intake and it fits great! I included a highly detailed video of the install if anyone was unsure how to install it.

Verified Purchase

2015 STI
gabriel.wilson289709 1 year ago
Sounds much better under the hood. I have the stock BOV and you can hear it much better now. The car feels a bit better under boost as well. Install was simple and fast with basic hand tools. Cleans up the appearance of the engine bay as well because it deletes a lot of plastic. The wrinkle red finish is not quite an exact match but so close that you cant tell unless its pointed out in a well lit area. (and I'm super picky here) Very good product and fast shipping. Thanks Rallysportdirect!

what are you waiting for buy it !!!!
RedSubaruSTI2015 2 years ago
Great product and great sound worth the money spent

Great Intake!
Rick C. 2 years ago
This AEM intake is incredibly high quality, it flows incredibly well and on top of that it looks and sounds great! Easy to install, easy to maintain, just a good intake all around!

  • Q:   jasonimrith 5 months ago


    Is a tune required for the aem intake?

    • A: Yes, tuning is required for this intake.

      Connor M. 5 months ago
  • Q: COI fitting  UNOSTI 1 year ago


    Does this intake fit a 2016 STI Limited?

    • A: This is confirmed to fit the 2015+ STI models including the 2016 STI.

      Nick S. 1 year ago
    • A: This is confirmed to fit the 2015+ STI models including the 2016 STI.

      Nick S. 1 year ago
  • Q: Intake  Jdmboy41 2 years ago


    What do we do about the tube running from the factory intake tube to the firewall?

    • A: The factory sound tube going to the cabin will not be connected to this intake and you can just leave it disconnected or remove it from the car.

      Zach G. 2 years ago
  • Q: Accessport  ZStewart 2 years ago


    I purchased the AEM Intake and currently have the stage 1 Cobb AP tune on my car, which tune should I use, the intake map from Cobb or keep it on the regular stage 1 file ?

    • A: Cobb does not currently have a map for the 2015's that support the AEM intakes at this time. Keep an eye out for the updates to come.

      guest57853c642a8d25b5018c44a7 2 years ago
    • A: So is my only choice to either get a custom tune done or to remove the cobb tune and run it stock ?

      ZStewart 2 years ago
  • Q: Filter?  GIJosh2687 3 years ago


    Does this come with the K&N Dry filter like the 08-14 model?

    • A: This will come with the dry filter.

      Kyle A. 3 years ago
Subaru WRX STI
Base 2015, 2016, 2017Limited 2015, 2016, 2017Launch Edition 2015Series.HyperBlue 2016