Fitment Information:
2005-2009 Subaru Legacy GT
2005-2009 Subaru Outback XT
2008-2014 Subaru WRX
2008-2014 Subaru STI
2009-2013 Subaru Forester XT
The SF Air Box adds the benefits of a cold air intake to the outstanding performance of the SF Intake. The factory inlet directs cold air from the front grill to the SF Airbox, which encloses the SF Intake. Hot engine bay air that robs horsepower is prevented from entering the intake system to provide consistent intake performance. This unique design also separates rainwater from the intake air, eliminating the water ingestion issues that plague in-fender cold air intakes. This intake airbox is constructed of 16 gauge aluminum, consisting of a one piece surround, directional lid, stainless steel hardware and all the necessary components for a seamless install with OEM quality fit and finish.
Very happy with my new AirBox. Fit perfect on my 2006 Otback with a Cosmo Racing Air Intake.
Will work for a 2006-09 Subaru Legacy with a 2.7l engine as well.
best looking box in the game.
I love that I no longer have to remove the stock air box to change my turn signal. If it weren’t for that, it’s kinda crazy to justify retail for this.
I also stuck some DEI heat reflective tape on the box and intake piping to try and keep IATs down. If it works it might be worth it a little more.
I also wish there was less of a gap between the top of the Cobb unit and the intake, almost exposing the MAF sensor and probably allowing some heat into the box. Check picture to see what I mean.
This box will not work if your running a 3” inlet unless you make modifications to the box
I used to use a 1/4 inch think plastic box I fabri-cobbled together, and it worked great. I only gained ~10 degrees above ambient, the only downside is it wasn’t very sturdy, and didn’t look great, so I bought the Cobb box to solve those problems.
The box looks great for starters. The finish is consistent, and I love the little Cobb plaque and the Cobb branded plastic washers, just killer.
The fitment on an 09 wrx is fine, but a bit lackluster. I could only position the intake/MAF pipe portion slightly too far away from the engine with the MAF inside the box, or rammed super far in toward the engine with the MAF outside the box… I ended up going with the former but neither was an easy setup…. Also the screw all the way toward the front left is very difficult to get to, as it’s covered by the intake snorkel thing. Which wouldn’t be an issue, except you have to install the intake snorkel thing before the lid, otherwise it won’t fit properly… you can get to it, but it’s annoying…
Lastly, the heat rejection isn’t great, my shotty DIY solution did a better job, with the new box averaging significantly hotter than the old one… and that was after wrapping the outside in heat wrap and sealing all the edges with rubber edge guard trim (which they need to send dramatically more of btw)… This is likely caused by two issues. First is thickness, as the thin metal transfers heat really quickly, and the second is edge protection. There’s a lot of excess space on top of where the intake…
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