Invidia Catted Downpipe Divorced Wastegate – Subaru Models (Inc. 2008-2014 WRX / 2008-2021 STI)

Catted Downpipe with Divorced Wastegate for Subaru WRX and STI Models

The Invidia Catted Downpipe with Divorced Wastegate for Subaru WRX and STI models is Invidia’s standard divorced wastegate downpipe for the EJ-series platform. High-flow catalyst, divorced wastegate design, 304 stainless, the proven Invidia downpipe for EJ Subaru builds. This is the single-bung variant for builds running only the factory narrowband O2 sensor.

DETAILS

• Divorced wastegate design
• High-flow catalytic converter
• 304 stainless steel
• Single O2 sensor bung
• Improves turbo efficiency and boost control

The divorced wastegate catted downpipe separates wastegate flow from the main turbine outlet, improving turbocharger efficiency and reducing the pressure fluctuations that affect boost control on the EJ platform. The high-flow catalyst eliminates the primary back pressure restriction while maintaining emissions compliance. The improvement over the factory downpipe is immediately noticeable in throttle response and turbo spool characteristics.

The single-bung variant is the correct choice for builds running only the factory narrowband O2 sensor in its standard position. If your build includes a wideband sensor or you are planning to tune the car, order the two-bung variant (INVHS08SW1DOC) instead, it includes the additional bung position required for wideband placement.

What’s in the Box

• Catted downpipe
• High-flow catalytic converter (integrated)
• Gaskets
• Mounting hardware
• Installation instructions

Why Choose Invidia

Invidia has been manufacturing performance exhaust systems in Japan since 1999, and in that time they have built a reputation that carries real weight in the tuning community. Every system is manufactured using SUS304 stainless steel and mandrel-bent tubing, which eliminates the flow restrictions and weak points that crush-bent alternatives introduce at every corner. Their in-house engineering team designs each application from scratch rather than adapting a generic template, which is why Invidia fitment is consistently tighter than the competition. The result is an exhaust that installs cleanly, seals correctly, and lasts. Invidia backs their products with a quality standard that is visible in the finish, the weld quality, and the hardware, details that reflect over two decades of refining the same core manufacturing process.

The RallySport Take

The Invidia catted divorced wastegate downpipe is the standard-specification downpipe for EJ Subaru builds across the community. We recommend verifying your sensor requirements before ordering, single bung for stock sensor configuration, two bung for tuned builds with wideband. Fits the 2008-2014 Subaru WRX with EJ255 and 2008-2021 WRX STI with EJ257.

Fitment