By increasing exhaust flow coming out of the turbocharger, an upgraded downpipe provides substantial power gains when combined with appropriate tuning.
#2015 wrx downpipe cobb upgrade
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. But trust us when we say either option will purr like a kitten. If there are no restrictions or your Subaru is solely a race car, a catless J-pipe will give it the biggest possible performance boost. This one piece 400 grade stainless steel cat has a much higher flow rate and longer lifespan and is highly efficient allowing the exhaust to flow much easier than the factory unit ever. 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. Our 2015 WRX catted J-pipe is so-named because it contains its own catalytic converter to reduce emissions in areas with stricter laws. The COBB downpipe design permits the air to flow with very little turbulence to the single high flow catalytic converter.
#2015 wrx downpipe cobb install
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 down stream into a COBB-exclusive GESi 300 cell high flow catalytic converter. Catted Downpipe (v2) 2008-2014 Subaru WRX 2008-2021 STI NEW DESIGN TurboXS 2008-2018 WRX/STI downpipe with high flow catalytic converter uses a massive cast 304 Stainless Steel Bellmouth that. Minimizing turbulence when exhaust gasses from the wastegate join into those flowing through the turbine helps to prevent excessive back-pressure. The power gained from installing a downpipe can vary depending on your specific car, variances in dyno measurements, and other factors, but any way you look at it, this is one of the biggest single power adders.The COBB Tuning GESi Catted 3" Downpipe begins with a CAD designed cast bellmouth that smoothly blends air exiting the turbocharger's turbine housing. This simple bolt-on installation offers excellent power gains, outstanding build quality and an impressive exhaust note. Made from 2.5' and 3' 304 stainless steel construction finished with quad 3.5' double wall tips. With California 91 octane fuel, you may see gains of up to 40hp with an e-tune. The COBB stainless steel cat-back exhaust fits 2015-2020 Subaru WRX and STi models.
This depends heavily on the octane rating of the fuel used. Tuners are reporting gains of up to 55 hp with 93-94 octane fuel with an aftermarket j-pipe. A downpipe is required for a stage 2 tune and will really bring your car to life. We've compared them to help you make your decision easier. We've compiled a list of the best, whether you want to go catless or catted, sticking with a high flow catalytic converter. With so many on the market, it can be hard to know which one to choose. With the relocation of the turbocharger for the 2015+ WRX, the first section of exhaust no longer requires a downward turn but instead uses a sharp 'j-turn' to route exhaust towards the back of the vehicle. Disclosure: When you click links to the various merchants on this site, we may earn a commission if you make a purchase.įor the 2015-2020 Subaru WRX, an aftermarket downpipe (otherwise known as a j-pipe) is one of the most substantial horsepower adding modifications you can do. The COBB J-Pipe replaces what is traditionally referred to as the 'downpipe' on previous Subaru vehicles.
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