Stillen Cold Air Intake with Heat Shield

2015+ WRX

Ships for free in the 48 states

SKU: 402000We price match!

On order from MFG
Average time to ship: 71 business days

Replacing the factory airbox and intake tube STILLEN is able to achieve a gain of 30 wheel horsepower. *NOT CARB Compliant* Shipping to California is restricted due to not being CARB compliant.
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STILLEN has decided to step into the Subaru WRX performance market with our performance cold-air intake system. They replace the restrictive factory air box with a genuine K&N reusable hi flow conical air filter. Replacing the factory airbox and intake tube STILLEN is able to achieve a gain of 30 wheel horsepower.

The filter sits behind a laser cut, CNC formed, lightweight aluminum heat shield. The purpose of the shield is to keep the cold air entering through the factory intake duct into the area surrounding the air intake. This creates a cold air path which helps to achieve the 30 horsepower gain.

During development of the 2015 Subaru WRX cold air intake STILLEN utilized one of our team members vehicles for the durability and data acquisition testing. After thousands of miles of trouble free driving we are confidently able to say that the STILLEN FA20DIT cold air intake will not set any check engine lights.


  • Increased Throttle Performance and Horsepower
  • Aluminum Mandrel Bent Intake Tubes
  • No Check Engine Light (CEL) Problems
  • Durable powder coated finish
  • Genuine K&N Filters with 1,000,000 Mile Warranty
  • Ease of Access to Filter Elements
  • Limited Lifetime Warranty
  • Plug and play MAF wiring harness
  • No Tuning Required

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3 customer reviews

Average rating
(based on 3 reviews)
Ease of Installation
Fit / Quality
Overall Satisfaction
  1. Intake

    By Dave June 21, 2017

    Throws the check engine light, will need a tune.

  2. Consider your options

    By David March 13, 2017

    Pipe fitment is absolutely terrible. The installation required the anchor bolt flange to be drilled out in order to align the pipe with the lower stock piping. The sound derived from the intake is nice but not worth the hassle of 'making' it fit. My advice is to carefully weigh your options...

  3. Best bang for your buck!

    By Joshua "Sir" Nelson February 1, 2017

    Overall, in my opinion this is the best Intake to run if you're not wanting to add a tune. One of the few systems that includes the heat shield at no additional cost. Stillen are heavy hitters with the Nissan community and now is a great chance for Subaru owners to get top notch parts at an entry level cost! As always, subispeed thanks for another great product, fast shipping and excellent customer service! (Consider me for that 100 gift card so my wife doesn't get so mad when I order from you guys)

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