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Invidia High Flow Cat with Extra O2 Bung for Select Subaru WRX, STI, & Legacy 2005-2014 (HS08SW1DOC)

$999.60 $1,428.00
-30%
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Invidia High Flow Cat with Extra O2 Bung for Select Subaru WRX, STI, & Legacy 2005-2014 (HS08SW1DOC)
$999.60 $1,428.00
$999.60 $1,428.00

Fits select 2005-2014 Subaru Impreza WRX, WRX STI, 2.5 GT, and Legacy GT.

The Invidia High Flow Catalytic Converter is designed for enthusiasts who want to improve turbo response and exhaust flow without the excessive noise or rasp often associated with catless systems. By utilizing a high-flow substrate, this downpipe section reduces backpressure at the turbo outlet, allowing for quicker spool-up and increased power across the RPM range. A dedicated extra O2 bung is pre-welded into the pipe, providing a convenient, plug-and-play mounting point for an aftermarket wideband sensor—essential for precise air/fuel ratio monitoring during tuning.

  • High-flow catalytic converter reduces restriction while maintaining exhaust scavenging
  • Integrated secondary O2 bung for wideband sensor installation
  • Constructed with heavy-duty flanges for a leak-free seal
  • Direct fitment for specific EJ-series turbocharged Subaru models
  • Manufacturer Part Number: HS08SW1DOC
🔧 Fitment & Compatibility
Year Make Model Submodel
2009-2010 Subaru Impreza 2.5 GT
2008-2014 Subaru Impreza WRX
2010-2014 Subaru Impreza WRX Limited
2009-2014 Subaru Impreza WRX Premium
2008-2014 Subaru Impreza WRX STI
2011-2014 Subaru Impreza WRX STI Limited
2010 Subaru Impreza WRX STI Special Edition
2005-2006 Subaru Legacy GT

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