304 Stainless Steel Downpipe with High-Flow Cat

The Invidia Catted Divorced Wastegate Downpipe offers a comprehensive exhaust solution for EJ-series turbocharged Subaru platforms. Engineered with a divorced wastegate design, it routes wastegate flow independently from the turbine outlet. This separation enhances turbocharger efficiency and minimizes pressure fluctuations, leading to improved boost control and a smoother power delivery. Constructed from durable 304 stainless steel with mandrel-bent tubing, this downpipe is built to last and withstand high performance demands. It includes a high-flow catalytic converter to maintain emissions compliance and features two bungs, providing flexibility for both the factory narrowband O2 sensor and a wideband sensor for tuning purposes. The integrated design replaces the OEM unit's restrictive catalytic converter, reducing back pressure and unlocking performance potential while adhering to emissions standards. It comes complete with all necessary gaskets, mounting hardware, and installation instructions. The two-bung configuration is specifically recommended for builds that utilize a wideband tuning solution. Fitment is confirmed for the 2008-2014 Subaru WRX with the EJ255 engine, the 2008-2021 Subaru WRX STI with the EJ257 engine, and the 2008-2014 Subaru Forester XT with the EJ255 engine.