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STM Downpipe / O2 Atmosphere Dump for FP SS Housing - Evo 7/8/9



Vehicle Fitment:
2001-2006 Mitsubishi Lancer Evolution VII VIII IX
• Fits with FP Evo IX stainless turbine housing
• Fits with TiAL MVS wastegate

With the release of the Forced Performance Evo IX stainless housings on the Zero, Zephyr, Red, Black and Green turbos came the need for a new o2 housing and downpipe style. The STM SS FP Downpipe is a direct fit to your new stainless housing and will bolt to any standard-placement, 3" two-bolt flanged cat or test pipe. This is designed for use with the TiAL MVS Wastegate and if you don't already have one, we offer them in the purchase menu as a package deal!

Also available Recirculated HERE!

• Hand-Fabricated
• Tig Welded
• Back Purged
• 3" Stainless Steel
• CNC & V-Band Flanges
• Gaskets & Hardware Included
• Optional TiAL MVS Wastegate

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

(1) STM Downpipe with Dump Tube
(1) V-Band Clamp (1415C)
(1) 3" 2-Bolt Remflex Gasket
(2) M10 x 35 Bolts
(2) M10 Nuts
(2) M10 Flat Washers
(Optional) TiAL MVS Wastegate

© All images are property of STM Tuned Inc

© All images are property of STM Tuned Inc

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Customer Reviews

Based on 4 reviews
Perfect fitment

I have installed these on several evos over the past couple years . Fitment is always spot on. Id suggest this to anyone running a stock frame fp turbo.

STM FP SS housing Downpipe single piece with O2 Dump

Pricey but welll worth it. Fitment was 9/10 only had to remove the small heat shield for AC wires to have the o2 sensor clear. Also lower braces will require spacers. Other then that craftsmanship is awesome. I can see a very slight increase on building boost with the SS housing no logs to really prove this yet. Be sure to have second bung welded on or test pipe with one already. Overall super happy with my purchase, fitment, and quality. Woulndt expect any less from the guys at STM.


Great customer service and awesome quality parts!!

Thank you for the awesome review, Phong! We're glad that you're pleased with the quality of your new downpipe, and we look forward to helping you in the near future with whatever you may need!

* STM Evo 7/8/9 SS FP O2/Downpipe with Atmosphere Dump for FP Stainless Turbine Housing

Thanks for the 5-star review, Phillip!

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