The STM Evo 7/8/9 O2 Housing Downpipe combo is the perfect bolt-on addition to your exhaust! Features a recirculated design to route the wastegate back through the 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.

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

Features:
• Recirculated
• 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

Weights:
• STM Downpipe weighs 9.7 pounds
• Gaskets & Hardware weigh 5.7 ounces

Purchase Includes:
(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

Shipping Times: 1-14 Days
Hand crafted and welded in New York, please give our fabricators time to assemble your piece!

Redesigned In February 2026:
The new design features the STM engraved stainless flange and smoother transitions for better flow. The updated downpipe is pictured in detail. V1 is pictured installed. Same fit, more flow!

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