Hyperflow Down Pipe with Metal Cat (WRX 08-14/STi 08-15)

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  • Regular price $595.00
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NEW DESIGN! The Hyperflow Exhaust 08+ downpipe with high flow catalytic converter uses a massive cast 304 Stainless Steel Bellmouth that tapers to 3.0" piping where it connects to the cat-pipe. This two-piece design allows you to remove the cat-pipe and add in a catless racepipe without replacing the entire down-pipe assembly.


  • Delete the catalytic converter without having to buy a whole new downpipe (Catless Race Pipe WS08-RP-V2 sold separately)
  • Easier installation
  • Cast 304 Stainless Steel Bellmouth upper section for maximum exhaust gas flow
  • 3.5 inch diameter 304 Stainless Steel pipe tapering smoothly to 3.0 inch
  • Spare wideband oxygen sensor bung included
  • Modified pipe path to provide more ground clearance for lowered cars than previous design
  • TIG welded and polished to a show quality finish


  • Down-Pipe
  • Cat-Pipe
  • Additional bung for second O2 port
  • All bolts and gaskets


  • 2008-2014 Subaru WRX
  • 2008-2015 Subaru WRX STi
  • 2010-2013 Subaru Forester SH XT