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

STM Tuned Inc.


More info below

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 the FP stainless housings and will bolt to any standard-placement, 3" two-bolt flanged cat or test pipe.

This is designed for use with the TiAL MVS 38mm Wastegate (not included - sold separately.

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

*Permanently Discontinued (STM-EVO-O2DPFP-AD)*
Now only available Recirculated

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

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
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Customer Reviews

Based on 8 reviews
Tyler Bader (Minneapolis, MN, US)
FP SS Housing - Evo 7/8/9

Awesome possum! This is a better design than the FP O2 housing that attaches to a factory style downpipe. I already sold another Evo owner on this part for his FP Black set-up.

Devin (Denver, CO, US)
Beautiful piece and fit

Love this downpipe. Quality is amazingly amazing. Fits great too

Slim (Edmonton, AB, CA)
Stm downpipe and dump for evo 9

Awesome quality and great fit I trimmed the heat shield for the power steering pump to clear the o2 sensor also with most aftermarket lower ic piping the wastegate dump is so tight to get it to fit properly I re fabed my dump tube like the picture and everything fits perfect I’m very satisfied

Ray Spencer (Lewiston, ME, US)
Amazing product!

This is by far the best option for anyone running a V-band style hot side turbo. It's the cleanest looking, highest quality piece you can get! I cant wait to get my Evo out of storage to install it! The fitment in the pictures is the cleanest fitting downpipe I've seen. (Others may fit AS well as this one, but this one is at the top of list with them) this is why I continually buy all my quality/performance needs through STM! Shipping is ALWAYS on point too! Even basic shipping is fast!

Stephen Palmer (Minot, ND, US)
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.

Cancer and Reproductive Harm