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Cobb Catted Downpipe WRX 2008-2014 / STI 2008-2019 / Forester XT 2009-2013 / Legacy GT / Outback XT 2005-2009

Regular price $650.00
SKU: 524203


The COBB Tuning downpipe begins with the CAD designed bellmouth that directs the air coming out of the turbo. The design permits the air to flow with very little turbulence to the single high flow catalytic converter. This metal substrate cat is highly efficient, allowing the exhaust to flow much easier than the factory unit ever would. The COBB downpipe, combined with our Accessport engine management, is one of the most easy installations for any enthusiast looking to unlock the true potential of their WRX.

The engineering that went into the COBB 3" Downpipe started with the CAD designed investment-cast turbine outlet, made of 304 stainless steel for enduring corrosion resistance and reduced heat transfer to the engine bay. The shape of the outlet flange smoothly blends the turbine outlet and wastegate gases. The outlet flange is configured with an O2 sensor bung to accommodate the stock O2 sensor.

A custom spun metal substrate high flow catalytic converter comes next. This one piece 400 grade stainless steel cat has a much higher flow rate and longer lifespan compared to ceramic or "brick" style cats. It also reaches operating temperature faster than other style cats for cleaner cold-start emissions. A second O2 sensor bung is used by the second OEM O2 sensor.

All tubing used in the fabrication of this downpipe is 304 stainless steel for increased corrosion resistance. The end flange uses the stock donut gasket and factory spring bolts to aid in flex, longevity and proper fitment. This provides an improved seal compared to other methods, as well as reduced noise. An additional benefit is that it makes the COBB 3" Downpipe compatible with any cat-back exhaust that mates to the factory cat section.


Customer Reviews

Based on 3 reviews
Should be the first part on your build list!

Couldn’t be happier with my decision to go with this downpipe. Install was easy, almost immediate performance gains were more than welcome, and the way my car sounds now (at idle and at WOT) is phenomenal!

Awesome business

Dane and Jacob took care of all my performance parts request. IIR is awesome. I’m definitely coming back soon.

No issues

Installed myself. Love it. Great sound and performance. Fit just fine with a Gimmick Cat-back