The COBB Tuning GESi Catted 3" Downpipe starts with a CAD-designed cast bellmouth that smoothly blends air exiting the turbocharger's turbine housing. By reducing turbulence when exhaust gasses from the wastegate join those flowing through the turbine, helps to prevent excessive back-pressure. The cast housing is capped off with a COBB logo and an auxiliary O2 bung for those wanting to install a wideband sensor early in the exhaust path.
A second O2 bung is situated immediately after the catalytic converter and is to be used by the OEM Rear O2 sensor. Exhaust fumes are transported downstream into a COBB-exclusive GESi 300 cell high flow catalytic converter using corrosion-resistant, mandrel-bent 3" 304 stainless steel tubing.
The tailpiece of the downpipe is finished with a cast, 304 stainless steel flange that was developed using CAD. The strengthened cast flange is less likely to warp during assembly, especially if you're putting it together with Hulk-like strength. Direct fit with the factory exhaust or COBB Cat-Back Exhaust using the OEM donut gasket is possible with the help of an adapter flange made of stainless steel and a provided MLS gasket. The factory spring bolts may be easily installed thanks to the supplied COBB unique shoulder nuts.
NOTE
- (Off-Road Only! Non-CARB Legal)
APPLICATIONS
- SUBARU STI (2008, 2009, 2010, 2011, 2012, 2013, 2014)
- SUBARU WRX (2008, 2009, 2010, 2011, 2012, 2013, 2014)
- SUBARU FXT (2009, 2010, 2011, 2012, 2013)
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
