Cobb SF Intake & Air Box Subaru WRX / STI 2008-2014 / Forester XT 2009-2013

Cobb Tuning

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Cobb's SF WRX Intake system utilizes several unique features in an effort to maintain optimal flow for performance while minimizing turbulence that can cause engine management problems. Cobb's straightener grid is specifically designed to smooth the incoming air flow as it passes the Mass Air Flow (MAF) sensor for precise readings. This eliminates the "dead spots" caused by intake turbulence.

In order to provide a WRX intake system that looks as good as it functions, Cobb utilized a one-piece plastic high-temperature composite plastic body. Not only does this save weight, it also prevents heat soak, keeping incoming air cooler. You will not find a more researched & developed short ram intake for your WRX than the Cobb SF. The COBB Tuning SF Intake system is designed around Cobb Accessport maps for maximum efficiency and power.

The Cobb Tuning SF Air Box was designed to capture the cool air supplied to the SF intake through the factory intake snorkle. The aluminum heat shield consists of a one piece surround, directional lid, and stainless fasteners that help reduce a loss of power that could be robbed from your motor by a heated intake charge. All necessary hardware and full illustrated instructions are included.


  • Intake pending CARB approval
  • The Cobb Air Box is designed for use with the Cobb SF Intake ONLY.
  • IMPORTANT: The COBB Tuning SF Intake system for the 2008+ WRX requires use of specific OTS (off the shelf mapping) provided with the AccessPORT ecu tuning device. Call for more info.


1 customer has reviewed this product.

Awesome quality like all COBB products.

, Jun 1, 2013
I have this on my 11 wrx and I couldn't be happier. However if one can't stand the sound of the turbo then a drop in filter may be better suited for you. Adds a nice look to the engine bay and really lets you hear the turbo spooling. Fits with my Fast Motorsports FMIC but not without modification to the airbox. If you're even considering this I would say go for it, even if the stock intake is good for ~400whp.

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You're reviewing: Cobb SF Intake & Air Box Subaru WRX / STI 2008-2014 / Forester XT 2009-2013