Invidia Catted Downpipe Divorced Wastegate w/ 2 Bungs – Subaru Models (Inc. 2008-2014 WRX / 2008-2021 STI)

Catted Downpipe with Divorced Wastegate and 2 Bungs for Subaru WRX and STI Models

The Invidia Catted Divorced Wastegate Downpipe with 2 bungs for Subaru WRX and STI models is a complete downpipe solution for the EJ-series turbocharged Subaru platform. The divorced wastegate design routes wastegate flow separately from the turbine outlet, improving turbocharger efficiency and reducing pressure fluctuations that affect boost control. The high-flow catalyst maintains emissions compliance.

DETAILS

• Divorced wastegate design
• Two O2 sensor / wideband bungs
• High-flow catalytic converter included
• 304 stainless steel
• Improves turbo efficiency and boost control

The factory Subaru EJ-series downpipe combines wastegate and turbine outlet flow before the catalyst, creating turbulence and wastegate resonance. The divorced design separates these flows for improved turbine efficiency and smoother boost control. Two bungs accommodate both the narrowband factory O2 sensor and a wideband for tuning.

The catted design maintains catalytic function while eliminating the OEM unit’s back pressure. This is the correct choice for builds that need emissions compliance alongside the performance improvement.

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 reference for EJ-series Subaru downpipe builds. The two-bung configuration is the correct specification for any build including a wideband for tuning, if you are tuning the car, order this version. Fits the 2008-2014 Subaru WRX with EJ255, 2008-2021 WRX STI with EJ257, and 2008-2014 Forester XT with EJ255.

Fitment