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NEW DESIGN! The Hyperflow Exhaust Down Pipe with a high flow catalytic converter uses a massive cast 304 Stainless Steel Bellmouth that tapers to 3.0 inch piping where it connects to the mid-pipe. Unlike previous designs, the new downpipe will bolt to any stock or 3 inch aftermarket catback exhaust system.


  • Two-piece design:
    • Reduced shipping costs
    • Delete the catalytic converter without having to buy a whole new downpipe (Catless Race Pipe WS02-RP 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
  • Hand TIG welded polished to a show quality finish

Vehicle Fitment:

  • Subaru WRX 01-07 (Manual)
  • Subaru STI 01-07 (Manual)
  • Subaru Forester XT 03-08 (Manual)


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