Cobb GESI Catted 3″ Downpipe | 02-07 Subaru WRX/STI & 04-08 Forester XT (512210) Cobb Tuning

02-07 WRX/STI & 04-08 Forester XT GESI Catted 3″ Downpipe by Cobb Tuning

The COBB Tuning GESi Catted 3″ Downpipe begins with a CAD designed cast bellmouth that smoothly blends air exiting the turbocharger’s turbine housing. Minimizing turbulence when exhaust gasses from the wastegate join into those flowing through the turbine helps to prevent excessive back-pressure. The cast housing is capped off with a COBB logo and auxiliary O2 bung for those wanting to install a wideband sensor early in the exhaust path.

Corrosion resistant and mandrel bent 3″ 304 Stainless Steel tubing carries exhaust gasses down stream into a COBB-exclusive GESi 300 cell high flow catalytic converter. A second O2 bung is located directly after the catalytic converter and is to be used by the OEM Rear O2 sensor.

A CAD designed, cast 304 stainless steel, flange finishes off the tail section of the downpipe. The reinforced cast flange is less susceptible to warp during assembly and for those of you installing with the strength of Hulk. A stainless adapter flange and included MLS gasket allows direct fit with the factory exhaust or COBB Cat-Back Exhaust utilizing the OEM donut gasket. Included COBB proprietary shoulder nuts allow installation of the factory spring bolts without fuss.

Features

• CAD Designed Cast Turbo Outlet for Maximum Flow
• 304 Stainless Steel for Corrosion Resistance
• High Flow GESi Catalytic Converter
• Two O2 Bungs for Factory & Aftermarket Sensors
• Included Adapter Utilizes Stock Donut Gasket for Optimal Sealing & Long Life
• Direct Fit with Factory Exhaust or COBB Cat-Back

Benefits

• Unleashes Previously Untapped Power
• Minimizes Turbulence & Reduces Backpressure
• Durable & Corrosion Resistant Construction

Applications

• 2002 – 2007 Subaru WRX
• 2004 – 2007 Subaru STi
• 2004 – 2008 Subaru Forester XT

What’s In The Box?

• 1 – GESI Catted Downpipe
• 1 – Adapter Flange
• 1 – MLS Gasket
• 2 – Shoulder Nuts (for factory spring bolts)

References

• Installation Instructions

Warranty

• COBB Tuning warrants to the original retail purchaser that all components manufactured by COBB Tuning, or sold under the COBB brand, hold a 12-month limited warranty from the date of purchase against defects in materials and workmanship.