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STM Evo X Stainless Cat-Back Exhaust

STM Tuned Inc.


The STM Evo X Stainless Steel Catback Single Exit Exhaust weighs in at only 18.2 pounds and will bolt up to your stock or aftermarket 3" cat or testpipe. The STM Exhaust utilizes your existing exhaust hangers and includes all gaskets and hardware for a clean and easy installation.

Vehicle Fitment:
2008-2015 Mitsubishi Lancer Evolution X
Features & Specs:
• Weighs Only 18.2 Pounds with Hardware & Gaskets
• Factory Cat-Back Weighs 43.35 Pounds
• Save 25.15 pounds!
• Hand Fabricated
• Tig-Welded
• Back-Purged
• Full 3" Stainless Steel
• 3" 2-Bolt Flanges
• CNC Flanges
• Gaskets and Hardware Included
• Utilizes Factory Exhaust Hangers
• Bolts to Stock or Aftermarket Test Pipe / Cat
• Deep Rumble
• Perfect Fitment

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

(1) STM Stainless 2-Piece Exhaust
(2) 3" Remflex Gaskets
(4) M10 x 35 Bolts
(4) M10 Flat Washers
(4) M10 Nuts

Install Notes:
The straight portion of the pipe is just slightly angled and can only be installed properly one way. Just check over the flanges first and match up the markings

Shipping Times: 4-6 Weeks
Hand crafted and welded in New York, please give our fabricators time to assemble your piece!

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© All content is property of STM Tuned Inc
We price match!
If you find it cheaper, just give us a call!
(585) 226-8226

© All content is property of STM Tuned Inc

We price match!
If you find it cheaper, just give us a call!
(585) 226-8226

Customer Reviews

Based on 8 reviews
Best Evo exhaust hands down IMO

The build quality is impeccable. It's honestly the ONLY exhaust that I wanted on my evo X. Back when I had my Evo 8, you guys were just starting to make these exhausts in aluminum.

Sounds Awesome

Probably best sounding exhaust ever, wasn't a big fan of the smaller tip initially but after seeing fitment first hand, i was turned around and really impressed. You can clearly hear turbo spool now through the exhaust. Wish I bought this system from the start.

Great exhaust!

There are so many companies out there now making evo x exhaust systems. I was overwhelmed at first. I was on a mission to find a single exit system that was built well and sounded great. This exhaust does just that and more.

Amazing sound and perfect fitment!

STM's single-exit exhaust is a great way to lose a ton of weight from the stock cat-back. The exhaust is beautiful; I honestly can't imagine that there is a higher quality piece on the market. I paired this with STM's resonated race pipe and STM's open-dump downpipe. The sound is really aggressive (especially at WOT), but not too loud and doesn't drone at all. The fitment was absolutely perfect. Overall, I'm extremely pleased with this exhaust!

We take a lot of pride in the design, fabrication, and development of our parts, so we thank you for the outstanding feedback.Thank you for trusting STM with your build, and thank you for your continued support- we appreciate your business, Austin!


If you want quality look no further. The exhaust looks amazing in person. Fitment is on point and it's lighter than the other SS cat-backs.

Enjoy, Alejandro! We appreciate your feedback, and we are more than happy that you noticed the craftsmanship that went into the construction of this piece. Our guys put in top quality work on every single piece, not just the parts we photograph, so this goes to show that the quality you see is exactly what you'll get.

Cancer and Reproductive Harm