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COBB Tuning 3" Downpipe For 2002-07 Subaru WRX / STI & 2004-08 Forester XT
COBB Tuning 3" Downpipe For Subaru WRX / STI & Forester XT
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 located immediately after the cat to be 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.
Subaru SS WRX / STI / Forester XT 3" Downpipe Features:
CAD Designed Cast Turbo Outlet for Maximum Flow
304 Stainless Steel for Corrosion Resistance
Custom Spun Metal Substrate High Flow Cat
Two O2 Bungs for Factory & Aftermarket Sensors
Utilizes Stock Donut Gasket for Optimal Sealing & Long Life
Model Year & Fitment
2002 Subaru WRX
2003 Subaru WRX
2004 Subaru WRX
2005 Subaru WRX
2006 Subaru WRX
2007 Subaru WRX
2004 Subaru STI
2005 Subaru STI
2006 Subaru STI
2007 Subaru STI
2004 Subaru Forester XT
2005 Subaru Forester XT
2006 Subaru Forester XT
2007 Subaru Forester XT
2008 Subaru Forester XT
CAD designed cast turbo outlet for maximum flow
Minimal bends for less restriction
304 stainless steel throughout for corrosion resistance
Custom spun metal substrate high flow cat
Two O2 bungs for factory sensors
Stock donut gasket for optimal sealing and long life
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HKS Downpipe for 2002-07 Subaru WRX / STI
Invidia Divorced & Catted Polished Stainless Steel Downpipe For 2002-07 Subaru WRX / STI & 2004-08 Forester XT
3" Downpipe to Stock Midpipe Exhaust Adapter
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1203 Baltimore Blvd.
Westminster, MD 21157
Integrity Auto Group Inc.