By increasing exhaust flow coming out of the turbocharger, an upgraded downpipe provides substantial power gains when combined with appropriate tuning.
The COBB Tuning GESi Catted 3" Downpipe is one of the premier modifications most owners look to upgrade on their turbocharged Subaru. Included COBB proprietary shoulder nuts allow installation of the factory spring bolts without fuss. 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. The reinforced cast flange is less susceptible to warp during assembly and for those of you installing with the strength of Hulk. A second O2 bung is located directly after the catalytic converter and is to be used by the OEM Rear O2 sensor.Ī CAD-designed, cast 304 stainless steel, flange finishes off the tail section of the downpipe. Click to release the boxer within Replace the restrictive factory WRX & STi turbo down pipe with the Empire Performance premium 3 stainless steel high.
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.Ī welded bracket utilizes the factory hard mount near the transmission reducing stress on the turbocharger mounting bolts and studs.Ĭorrosion-resistant and mandrel bent 3" 304 Stainless Steel tubing carries exhaust gasses downstream into a COBB-exclusive GESi 300 cell high flow catalytic converter. Minimizing turbulence when exhaust gasses from the wastegate join into those flowing through the turbine helps to prevent excessive back-pressure. The COBB Tuning GESi Catted 3" Downpipe begins with a CAD-designed cast bellmouth that smoothly blends air exiting the turbocharger's turbine housing. While this combo of parts isn’t likely to be an pre-configured OTS. We have enjoyed seeing all of the 2015 WRX custom tune results being posted around the ‘net and decided to jump in with our own after a bit of playing around with our car on the Austin R&D dyno today. Some pipes are for track-dedicated race cars only and may not be legal for street use. 2015 WRX Tuning Results : 344 WTQ / 313 WHP.
Two O2 Bungs for Factory & Aftermarket Sensors.304 Stainless Steel for Corrosion Resistance.CAD-Designed Cast Turbo Outlet for Maximum Flow.Includes two o2 bungs for stock and aftermarket sensors. The COBB 3" GESi Catted Downpipe for 2008-2014 WRX and 2008-2020 STi models is a direct replacement piece made from 304 stainless steel construction with a bellmouth CAD designed cast turbo outlet for maximum flow.
COBB GESi Catted Downpipe for 2008-2020 STi/WRX - 524210