08-18 STI / 08-14 WRX CSM Downpipe G2

  • Sale
  • $ 579

Our new stock location generation 2 downpipe has a divorced wastegate design with wastegate divider for low turbulence and maximum flow. It includes a durable stainless 200 cell high flow spun metallic cat placed as far back as possible to mitigate heat soak. For gen 2 we added a thicker 1/2" 304l stainless turbo flange that's nearly impossible to warp even for high horsepower applications. A reinforced hanger was added to handle the most extreme abuse on and off the car.


  • Entirely made from 304l stainless steel (excellent against corrosion)
  • Available with 2.5" or 3" 2-bolt flange
  • 1/2" thick SS turbo flange, no warping, cut on waterjet machine
  • Thick walled tubing .065" thickness for extra durability
  • All welds are Tig welded, shielded and purged with argon
  • Made in the USA


  • Cobb Accessport is mandatory with this downpipe
  • We highly recommend a protune by your local tuner 
  • Contact us for wideband O2 bung free of charge
  • If you would like our external wastegate version please contact us
  • Please contact us if you want our non catted version
  • Should fit 09-13 forester XT and 05-09 Legacy GT but not confirmed
  • Fits 2015-2018 STI
  • For off-road use only