STM O2 Downpipe with Atmosphere Dump for OEM-Style Housing Evo 7-9


$549.00 $595.00

Product Description

The STM O2 Housing Downpipe combo is the perfect bolt-on addition to your exhaust! The all-in-one stainless steel design will eliminate extra hardware and flow smoothly straight through from the turbo utilizing the tapered CNC flange. All gaskets and necessary hardware are included for a clean install.


  • Hand Fabricated
  • Tig-Welded
  • Back-Purged
  • 3" Stainless Steel
  • CNC Flanges
  • Gaskets and Hardware Included


Made in the USA!
Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects.


  • (1) STM Stainless Downpipe
  • (1) STM Divided Turbo Outlet Gasket (STM-EVO-SSG-DTO)
  • (1) 3" 2-Bolt Remflex Gasket
  • (2) M10 x 35 Bolts
  • (2) M10 Nuts
  • (2) M10 Flat Washers


  • 2001-2006 Mitsubishi Lancer Evolution VII VIII IX
  • Fits with OEM or factory-style turbo hotside