SET YOUR CAR
As low as 0% APR Financing
FREE SHIPPING
On orders over $200
TALK TO A PARTS EXPERT
RALLYSPORT GUARANTEE
100% Money Back on Select Parts
AEM Cold Air Intake ( Part Number:AEM 21-478WR)

AEM Cold Air Intake - Subaru WRX/STI 2008-2014

MODEL # AEM 21-478WR
Manufacturer Part # 21-478WR

$276.99

MSRP: $408.39

24
hours
In stock! Ships same day
Qualifies for free shipping!


Buy as a package deal and save:
RallySport Direct 2011 Subaru STI Project Car POWER Kit ( Part Number:RSD 11STIPCP)
RallySport Direct 2011 Subaru STI Project Car POWER Kit
As low as $8,957.68
View Product

Description

AEM Intake Systems are designed to provide the user with performance gains they can count on. These have been engineered, tuned, and dyno-tested for vehicle specific applications.

The factory intake system is known for being restrictive. The AEM kits will allow the turbocharger to breathe at a better rate providing more horsepower, torque, and throttle response. Expect to hear an audible enhancement under wide open throttle conditions as well.

The AEM intake includes the Dryflow synthetic washable filter for optimum airflow. This means that the filter can be serviced if it should happen to become dirty. Also included is a mandrel-bent aluminum intake tube that will allow for a smooth airflow passage to the turbo. Lastly, the hardware is provided for a ready installation.

SHARE THIS
| | | | |

Specifications


Brand: AEM
Carb Exempt: Yes
Carb E.O. Number: D-670-21
Filter Color: Grey
Filter Element Type: Dry
Filter Material: Cotton
Filter Reusable: Yes
Includes Airbox: Yes
Piping Color: Red
Piping Material: Aluminum
Tuning Required: No

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.
Standard
  INSTALLATION INSTRUCTIONS

PEOPLE WHO VIEWED THIS ITEM ALSO VIEWED

4.4

5 STAR
40%
4 STAR
60%
3 STAR
2 STAR
1 STAR

Awesome Intake, PITA Install
rulejunior 9 months ago
I ordered this to go along with the archived stage 1 maps for my 2010 WRX Sedan to help deal with the summer heat and to give me a little extra kick in the pants off the line, plus who doesn't love a little extra turbo noise under the hood? Assembly was relatively easy, as the intake was simple to put together and removing the stock intake was trivial. However, the engine bay was tight and getting this to fit in was an undertaking that took a couple shots. Once in, hooking it up went smooth, One tip was to fit the silicone coupler on the turbo intake tube before sliding it on the CAI pipe, which is what I did and made it a little easier to install. All in all, I give it 4 stars. That final install was just a killer for me
Comment

You need this. Trust me.
DROOTx26 1 year ago
This product definitely opens up what was hiding in your engine all along. If you go from stock to this, plus a Cobb Accessport (AEM archived map available only up to Stage 2) you'll definitely feel your power gains. The sounds are amazing as well. Easy straight-forward install. AEM is top quality all around. Highly recommend.

Comment
Verified Purchase

Solid CAI for 2013 Subaru WRX
Jesse 1 year ago
I have the COBB access port and have been monitoring my inlet temperatures for a while now. I also used to own the COBB "cold air" intake as well. This intake has a much better design than the COBB intake in that it routes the filter into the wheel well and does a pretty decent job of sealing away from the engine. At cruising speeds the temps tend to say around 10° - 12° above ambient and then at stop and go traffic will jump up a bit to 15° to 20 ° above ambient. In comparison to the COBB intake, the temps would stay 2° to 3° cooler at cruising but jump up 40° to 50° above ambient in stop and go traffic. In summary, I believe that this intake keeps the temperature pretty consistent with ambient but due to the lack of airflow in the wheel well the temps tend to be slightly higher at cruising than the stock intake and the COBB intake due to their use of the factory snorkel. I might try drilling out the holes in the grill piece of the front bumper to let more air into the wheel well - will update if i do.
Comment
Verified Purchase

Great Intake, Great Sounds , Improved top end.
Stephen G 2 years ago
I originally bought this to help with the summer heat and it definitely did. The car doesn't feel as sluggish during the hot weather so I gave it a 5 in Performance. I gave it a 4 on ease of install because its pretty straight forward but some of the parts are a pain in the ass to align up and move around. Good on price compared to others. And the quality of everything was excellent. I gave it a 4 overall because while your installing it into the fender area if you move it too much the metal on the car will cut up the filter so make sure you get the filter cover which I couldn't wait to get and will probably have to replace the filter early.
Comment
Verified Purchase

aem cold air intake
nyzmostwanted0 2 years ago
Great intake very easy to install nd the performance is great .i love the sound nd would highly recommand this cold air intake
Comment

  • Q: CARB Sticker  Brandon 2 months ago

    Answer

    Does this come with the CARB exempt sticker?


    • A: Yes, this intake will come with a CARB sticker.


      Jared A. 2 months ago
  • Q: Upgraded turbo inlet?  Wolfhead 5 months ago

    Answer

    Will this fit on a 3" perrin inlet?


    • A: Yes this can fit with the Perrin 3" inlet.


      Tyler G. 5 months ago
  • Q: Tune Required?  Norm S. 1 year ago

    Answer

    Will this require a tune? I've been told a few places that I can add a new intake without getting a tune, but I wanted to be sure since I'm completely stock aside from my clutch. Also, Will I need to add something to this for when it rains? I live in Florida where it rains during rallycross season and I'm not sure if I need more protection for my intake.


    • A: For any intake it is recommended that you do get a tune. For rain you can use a filter. https://www.rallysportdirect.com/part/Intake-Filter-Element-Cleaning-Kit-Accessories/aem-1-4001-aem-dryflow-pre-filter-air-filter-wrap-6in-base-5-25in-top-9in-tall


      Jared A. 1 year ago
  • Q: AEM cai maf pipe metric internal diameter?  green_nobleman754029 1 year ago

    Answer

    What is the AEM cai maf pipe metric internal diameter? 70mm?


    • A: Sorry but we do not have the specs for the inside diameter of this pipe.


      Chris W. 1 year ago
    • A: The ID of this maf housing is 2.75 inches or 69.85MM


      Connor M. 1 year ago
  • Q: Size  SubÉric 1 year ago

    Answer

    What is the inside diameter of the piping?


    • A: Sorry but we do not have the specs for the inside diameter of this pipe.


      Chris W. 1 year ago
Subaru Impreza
2.5 GT Hatchback
2009 Subaru Impreza 2.5 GT Hatchback
2010 Subaru Impreza 2.5 GT Hatchback
2.5 GT Sedan
2009 Subaru Impreza 2.5 GT Sedan
2010 Subaru Impreza 2.5 GT Sedan
WRX Hatchback
2008 Subaru Impreza WRX Hatchback
2009 Subaru Impreza WRX Hatchback
2010 Subaru Impreza WRX Hatchback
2011 Subaru Impreza WRX Hatchback
2012 Subaru Impreza WRX Hatchback
2013 Subaru Impreza WRX Hatchback
2014 Subaru Impreza WRX Hatchback
WRX Limited Hatchback
2010 Subaru Impreza WRX Limited Hatchback
2011 Subaru Impreza WRX Limited Hatchback
2012 Subaru Impreza WRX Limited Hatchback
2013 Subaru Impreza WRX Limited Hatchback
2014 Subaru Impreza WRX Limited Hatchback
WRX Limited Sedan
2010 Subaru Impreza WRX Limited Sedan
2011 Subaru Impreza WRX Limited Sedan
2012 Subaru Impreza WRX Limited Sedan
2013 Subaru Impreza WRX Limited Sedan
2014 Subaru Impreza WRX Limited Sedan
WRX Premium Hatchback
2010 Subaru Impreza WRX Premium Hatchback
2011 Subaru Impreza WRX Premium Hatchback
2012 Subaru Impreza WRX Premium Hatchback
2013 Subaru Impreza WRX Premium Hatchback
2014 Subaru Impreza WRX Premium Hatchback
WRX Premium Sedan
2010 Subaru Impreza WRX Premium Sedan
2011 Subaru Impreza WRX Premium Sedan
2012 Subaru Impreza WRX Premium Sedan
2013 Subaru Impreza WRX Premium Sedan
2014 Subaru Impreza WRX Premium Sedan
WRX STI Hatchback
2008 Subaru Impreza WRX STI Hatchback
2009 Subaru Impreza WRX STI Hatchback
2010 Subaru Impreza WRX STI Hatchback
2011 Subaru Impreza WRX STI Hatchback
2012 Subaru Impreza WRX STI Hatchback
2013 Subaru Impreza WRX STI Hatchback
2014 Subaru Impreza WRX STI Hatchback
WRX STI Limited Hatchback
2011 Subaru Impreza WRX STI Limited Hatchback
2012 Subaru Impreza WRX STI Limited Hatchback
2013 Subaru Impreza WRX STI Limited Hatchback
2014 Subaru Impreza WRX STI Limited Hatchback
WRX STI Limited Sedan
2011 Subaru Impreza WRX STI Limited Sedan
2012 Subaru Impreza WRX STI Limited Sedan
2013 Subaru Impreza WRX STI Limited Sedan
2014 Subaru Impreza WRX STI Limited Sedan
WRX STI Sedan
2011 Subaru Impreza WRX STI Sedan
2012 Subaru Impreza WRX STI Sedan
2013 Subaru Impreza WRX STI Sedan
2014 Subaru Impreza WRX STI Sedan
WRX STI Special Edition Hatchback
2010 Subaru Impreza WRX STI Special Edition Hatchback
WRX Sedan
2008 Subaru Impreza WRX Sedan
2009 Subaru Impreza WRX Sedan
2010 Subaru Impreza WRX Sedan
2011 Subaru Impreza WRX Sedan
2012 Subaru Impreza WRX Sedan
2013 Subaru Impreza WRX Sedan
2014 Subaru Impreza WRX Sedan