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AEM 21-732C Cold Air Intake System (Non-CARB Compliant)

4.6 4.6 out of 5 stars 148 ratings

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Brand AEM
OEM Part Number 21-732C
Product Grade
Performance Part
Fit Type
Vehicle Specific Fit

About this item

  • Increases Power & Torque
  • Relocates Air Filter Outside Engine Compartment
  • Guaranteed for the life of your car or truck
  • Comes with a lifetime DRYFLOW Synthetic air filter with great filtration
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$349.99
Get it as soon as Tuesday, Apr 2
Only 19 left in stock (more on the way).
Ships from and sold by Amazon.com.
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$388.99
Only 5 left in stock - order soon.
Ships from and sold by AKKON.
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$69.99
Get it as soon as Tuesday, Apr 2
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Product Description

AEM Cold Air Intake Systems are designed to produce horsepower and torque gains. They replace the restrictive factory airbox and air filter to give you better performance and better engine sound. AEM cold air intakes relocate the air filter outside the engine compartment so cooler air can be fed into your engine. Cooler air carries more oxygen, which translates into a more intense explosion in the combustion chamber for more horsepower and torque. AEM Cold Air Intakes include an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration, and performance while allowing easy oil-free cleaning. They include a mandrel-bent aluminum intake tube and high quality hardware designed to reduce restriction and reduce intake temperature. The design and components of each intake system vary so consult the installation instructions for more information on the contents of each part number. This Air Intake cannot be sold in California. It is not legal for use in California or other states adopting California emission standards.

Product information

Technical Details

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Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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AEM 21-732C Cold Air Intake System (Non-CARB Compliant)


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What's in the box

  • Cold Air Intake System
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    Price-13% $349.99
    List:$399.99
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    Delivery
    Get it as soon as Tuesday, Apr 2
    Get it as soon as Friday, Apr 5
    Get it as soon as Monday, Apr 8
    Get it as soon as Tuesday, Apr 2
    Get it as soon as Tuesday, Apr 2
    Get it as soon as Tuesday, Apr 2
    Customer Ratings
    Sold By
    Amazon.com
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    material
    Aluminum
    Aluminum, Stainless Steel
    Aluminum, Stainless Steel
    Alloy Steel
    Aluminum, Alloy Steel
    Aluminum
    model number
    AEM-21-732C
    827-545WB
    827-545R
    69-8001TWR
    MMAI-WRX-22MWBK
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    fit type
    Vehicle Specific Fit
    Vehicle Specific Fit
    Vehicle Specific Fit
    Vehicle Specific Fit
    Vehicle Specific Fit
    V
    product grade
    Performance Part
    Performance Part
    Performance Part
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    Looking for specific info?

    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    148 global ratings

    Customers say

    Customers like the sound quality, ease of installation, quality and value of the engine air filter. For example, they mention it's easy to install, has a deep loud breath and that it'll increase turbo max. They also appreciate the performance, saying it gives a little more power, has more throttle response and that the 2nd gear lag is almost gone.

    AI-generated from the text of customer reviews

    19 customers mention17 positive2 negative

    Customers like the sound quality of the engine air filter. They say it has an amazing sound, they love the turbo noises, and they can clearly hear the stock BOV. Customers also mention that the air suction is clear and there is a lot of whoosh.

    "...The intake sounds amazing at 4k to 6k rpm (Swoosh) while changing gears...." Read more

    "...Can clearly hear the air suction, and I feel that the car has a little more torque than before. I would highly recommend for anyone who is undecided...." Read more

    "...You can definitely hear the turbo and stock blow off valve now. Sounds great and makes shifting through those first few gears a blast...." Read more

    "...Sounds very good with the boomba a bpv! A lot of whoosh! And tututu!..." Read more

    16 customers mention16 positive0 negative

    Customers find the installation of the engine air filter to be easy if they have mechanical experience and the correct tools. They also say the directions are well written and the intake itself went on easy.

    "...Should've purchased this months ago. Easy install and sounds great! Makes me want to switch through the gears much quicker at a higher RPM...." Read more

    "Good product. Good and easy instructions for installation. Only detail, make sure the pipe is clean...." Read more

    "...That being said the directions are well written and the intake itself went on easy. You can definitely hear the turbo and stock blow off valve now...." Read more

    "Easy installation, throat response improvement and she breaths now, deep loud breaths and it’s great!..." Read more

    11 customers mention11 positive0 negative

    Customers are satisfied with the quality of the engine air filter. They mention that it is a great product, made of good quality materials, and works perfectly.

    "...I'm very happy with this cold air intake and the quality seems top notch in my opinion." Read more

    "The AEM cold air intake is very well made. I’m not the handiest guy around but was able to install the entire thing in about an hour...." Read more

    "Good product. Good and easy instructions for installation. Only detail, make sure the pipe is clean...." Read more

    "The cold air intake works great. Makes a big difference with my engine sound through exhaust! I have to do more work on Subaru WRX...." Read more

    9 customers mention9 positive0 negative

    Customers appreciate the value of the engine air filter. They say it's well worth the money, a great buy, and has zero buyers remorse.

    "...Zero buyers remorse and I absolutely love my car even more now." Read more

    "I love the turbo noises... great buy. I no longer drive with the radio on. Lol." Read more

    "...Absolutely worth every penny." Read more

    "Great product but pricey. Recommend if you don’t mind the price" Read more

    7 customers mention7 positive0 negative

    Customers are satisfied with the performance of the engine air filter. They mention that it improves performance with more throttle response, and it increases turbo max. The filter is easy to install and has no engine light or tune required. Customers also say that the 2nd gear lag is almost gone.

    "...Overall the performance improved with more throttle response and the second gear fade in torque @4400 rpm is much smaller...." Read more

    "...I get an extra 1 or 2 MPG, a little more power, and it sounds cool, but still deep...." Read more

    "...1 the sound of the air is louder and sounds cool AF. 2 it gave it a little more power, just enough to notice a slight change..." Read more

    "Super easy install, increased low end power slightly no engine light no tune required (but i recommend to get most gains from this intake) and the..." Read more

    Perfect fit 2020 Subaru WRX limited
    5 Stars
    Perfect fit 2020 Subaru WRX limited
    Took about 1hr to install. Do yourself a favor and pull the splash guard underneath the passenger side to access the bolts underneath the the old air intake you're taking out. It will make your install much easier. This is not in the instructions but should be.I can't notice the extra HP and not sure if it will need a tune or not. It states a tune isn't needed but as I read up more and more about cold air intakes on subarus it seems it may be needed, will update if so.If you pull the negative on the battery to do the installation you will need to reprogram your auto up/down windows. To do this just roll the driver side down and keep holding the down for five seconds after its down, then put it back up and keep holding for five seconds after it's fully up. Repeat on the passenger door and this will reprogram each window so they work correctly again.The intake sounds amazing at 4k to 6k rpm (Swoosh) while changing gears. I'm very happy with this cold air intake and the quality seems top notch in my opinion.
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    Top reviews from the United States

    Reviewed in the United States on September 10, 2023
    Customer image
    5.0 out of 5 stars Perfect fit 2020 Subaru WRX limited
    Reviewed in the United States on September 10, 2023
    Took about 1hr to install. Do yourself a favor and pull the splash guard underneath the passenger side to access the bolts underneath the the old air intake you're taking out. It will make your install much easier. This is not in the instructions but should be.

    I can't notice the extra HP and not sure if it will need a tune or not. It states a tune isn't needed but as I read up more and more about cold air intakes on subarus it seems it may be needed, will update if so.

    If you pull the negative on the battery to do the installation you will need to reprogram your auto up/down windows. To do this just roll the driver side down and keep holding the down for five seconds after its down, then put it back up and keep holding for five seconds after it's fully up. Repeat on the passenger door and this will reprogram each window so they work correctly again.

    The intake sounds amazing at 4k to 6k rpm (Swoosh) while changing gears. I'm very happy with this cold air intake and the quality seems top notch in my opinion.
    Images in this review
    Customer image Customer image Customer image
    Customer imageCustomer imageCustomer image
    One person found this helpful
    Report
    Reviewed in the United States on November 16, 2015
    10 people found this helpful
    Report
    Reviewed in the United States on June 24, 2019
    2 people found this helpful
    Report
    Reviewed in the United States on March 6, 2024
    Reviewed in the United States on June 7, 2016
    Customer image
    5.0 out of 5 stars 2016 Subaru WRX
    Reviewed in the United States on June 7, 2016
    Installed this intake yesterday. Took me a bit longer than others because I'm not a mechanic by any means. But with a couple beers and a wrenches everywhere, I got it installed. That being said the directions are well written and the intake itself went on easy. You can definitely hear the turbo and stock blow off valve now. Sounds great and makes shifting through those first few gears a blast. This is my second time purchasing an AEM intake for my cars and I'll continue to use them.
    Images in this review
    Customer image
    Customer image
    12 people found this helpful
    Report
    Reviewed in the United States on February 4, 2019
    2 people found this helpful
    Report
    Reviewed in the United States on March 16, 2023
    Reviewed in the United States on February 19, 2021

    Top reviews from other countries

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    Michael Johnson
    5.0 out of 5 stars Plug and play!
    Reviewed in Canada on May 5, 2023
    Customer image
    Michael Johnson
    5.0 out of 5 stars Plug and play!
    Reviewed in Canada on May 5, 2023
    Easy install, plug and play, seems like my boost has increased by 2%, turbo schools up faster, fuel economy has gone up, and the blow off sounds good,
    No recalibration needed, good value for the price
    Images in this review
    Customer image
    Customer image
    Dirt McGuirt
    5.0 out of 5 stars Wssssshhhhh
    Reviewed in Canada on January 5, 2023
    Cecil
    5.0 out of 5 stars Easy to install and works as advertised
    Reviewed in Canada on July 20, 2019
    Jean-Sébastien
    5.0 out of 5 stars Nice
    Reviewed in Canada on June 14, 2021
    Jonathan Michaud
    5.0 out of 5 stars 👍🏼
    Reviewed in Canada on June 10, 2020