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AEM Cold Air Intake Gunmetal ( Part Number:AEM 21-732C)

AEM Cold Air Intake Gunmetal - Subaru WRX 2015+

MODEL # AEM 21-732C
Manufacturer Part # 21-732C


MSRP: $420.29

In stock! Ships same day
Qualifies for free shipping!

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RSD RallySport Direct 2015 Subaru WRX Project Car POWER Kit ( Part Number:RSD 15WRXPCP)
RSD RallySport Direct 2015 Subaru WRX Project Car POWER Kit
As low as $1,944.23
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RallySport Direct is proud to provide you with another quality performance intake system brought to you by AEM.

On this page, 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.

Here are the details:

  • Tuned and dyno-tested to improve acceleration and engine sound
  • Low restriction aluminum intake pipe
  • Intake pipe will come powder-coated a gunmetal 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
  • Note that a tune is required to utilize the maximum performance from this intake
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Brand: AEM
Carb Exempt: Yes
Carb E.O. Number: D-670-22
Filter Color: Red
Filter Element Type: Dry
Filter Material: Cotton
Filter Reusable: Yes
Includes Airbox: Yes
Piping Color: Grey
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.




2018 WRX install NOT that simple
New to Subaru - 2018 WRX 15 days ago
The install should have been fairly simple, however on my 2018 WRX the hose clamp for the lower bellows was turned face down making it impossible to access with a screwdriver except from underneath the car (and removing a ton of stuff to get to it). Luckily I had a very small socket wrench that I was able to blindly feel my way onto the hex head and VERY slowly loosen it with roughly 1/8 turns. It was also not that easy to secure the bellows onto the new pipe as there is not a lot of space to work with and the fit was almost too tight (maybe because the car is still so new with less than 250 miles). And on top of that, they did not provide one of the "included" bolts, so I had to dig through my collection of random screws and bolts and finally found one that worked. Maybe the 2015-2017 models are easier, but this took me a sold 2 hours all said and done, and I was left with scratched and slightly cut up hands and arms from the various nooks and crannies I had to maneuver around.
Verified Purchase

awesome sound
907sandoval 3 months ago
Worked great on my wife's car easy to install made for a fun project takes about 25min to put on
Verified Purchase

AEM cold air intake 2015 wrx
WILDEWRX 2 years ago
Really straight forward install and high quality parts. Fit and finish is really nice and the piping's paint is very high quality, not to mention the filter is one of the nicest ones I've used on any of my cars. The sound is amazing coupled by a aftermarket bypass valve! Really loud!

Verified Purchase

Deez 2 years ago


Intake performance
guest561212ca4da8c3c04b8b4595 3 years ago
On the stock tune this intake does no such power gains that were promised on the box if anything the feels like it has noticeably less power with this Intake installed. Not sure of the performance gains with a pro tune but I would not reccomend. Stick with the stock intake!!
BananaSammiches 11 months ago
You won't see any power gains from an intake without a tune, no matter who makes it or what they promise it'll produce. Additionally, it's actually bad for your car to install an aftermarket intake without a tune, as it causes an incorrect air/fuel mixture and makes your engine run too lean.

  • Q: Which Tune to run  Subie life 9 months ago


    Before I purchase I wanted to make sure Cobb had a Map and I cant find one for this intake specifically. Is there one or is there a generic that should be used.

    • A: Cobb only has intake maps for the Cobb Big SF Intake at this time. This intake would require a custom tune.

      Evan M. 9 months ago
  • Q: AEM COLD Air Intake for 2015 WRX Premium  opfor95 2 years ago


    I would like to put this system on my car. I would like to know if there are Off The Shelf Maps for the Cobb Access Port from Cobb for It, or not. I would rather have a dry system over the Cobb Big SF intake system if possible. I have the access port and I would really rather not have to use wet Cobb set up.

    • A: This would probably work with the Stage 1 map from Cobb. The Accessport is designed to work with Cobb products, so getting a Cobb intake will allow for the most performance gains.

      Chris W. 2 years ago
  • Q: Sound  japangloko 3 years ago


    Which BOV is being used in conjunction with the intake?

    • A: If you are referring to our video about the product, we have the Turbosmart Dual Port Blowoff Valve for the 2015 WRX installed on our vehicle. Part number TBS TS-0215-1018.

      Nick S. 3 years ago
    • A: Thanks. How does it sound stock?

      japangloko 3 years ago
  • Q: Requirements ?   james_nickerson23 3 years ago


    Does this require a tune or 93 octane fuel? Or is it okay with 91 and no tune. Also how much hp boost can realistically be expected ?

    • A: AEM claims that tuning is not required, but we recommend getting a tune with any intake. You can use 91 octane fuel and AEM was able to gain 25hp and 30 ft-lbs of torque.

      Zach G. 3 years ago