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Exhaust› Catalytic Converters

Invidia

304 Stainless Steel Downpipe with High-Flow Cat

$1,428.00 $814.46 Save $613.54

SKU: INVHS08SW1DOC

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INSTALL DIFFICULTY
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Moderate — 2–4 hours

Overview

It features a high-flow catalytic converter and two bungs for O2 sensors. Constructed from 304 stainless steel, this downpipe improves turbocharger efficiency and boost control by separating wastegate flow from the turbine outlet.
Show original supplier description
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.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandInvidia
Part NumberINVHS08SW1DOC
CategoryExhaust

Videos

INSTALLING MY INVIDIA HIGH FLOW CATTED DOWNPIPE ON MY STI!!

INSTALLING MY INVIDIA HIGH FLOW CATTED DOWNPIPE ON MY STI!!
🤗 STI GOES FULL "STAGE 2" WITH INVIDIA DOWNPIPE INSTALL | 2015-2019 SUBARU WRX STI

🤗 STI GOES FULL "STAGE 2" WITH INVIDIA DOWNPIPE INSTALL | 2015-2019 SUBARU WRX STI
Subaru WRX STI Invidia Catted Downpipe + Tomei Expreme Comparison

Subaru WRX STI Invidia Catted Downpipe + Tomei Expreme Comparison
Invidia Divorced Wastegate Catted Downpipe (WRX / STi / Legacy GT) HS05SW1DPC - Maperformance.com

Invidia Divorced Wastegate Catted Downpipe (WRX / STi / Legacy GT) HS05SW1DPC - Maperformance.com
Invidia Catless Divorced Downpipe Install! (2017 WRX STI Stage 2)

Invidia Catless Divorced Downpipe Install! (2017 WRX STI Stage 2)
INVIDIA CATLESS DOWNPIPE INSTALL!!!(COBB STAGE 2 TUNE)

INVIDIA CATLESS DOWNPIPE INSTALL!!!(COBB STAGE 2 TUNE)
2011 Wrx Invidia Downpipe Before and After

2011 Wrx Invidia Downpipe Before and After

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