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STM O2/Downpipe with Atmosphere Dump for OEM-Style Housing - Evo 7/8/9

STM Tuned Inc.


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

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

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Customer Reviews

Based on 1 review

This downpipe looks amazing! Beautiful welds and clean stainless. Only downside, didn’t come with replacement gaskets for the price paid.

Hi Daniel, Thank you so much for the kind words. This downpipe should indeed come with a gasket, I have sent you an email in regards to hopefully getting a gasket sent out to you asap and apologize for the inconvenience.

Cancer and Reproductive Harm