• 15+ Years of Performance Parts, Tuning & Installation

STM Stainless Cat-Back Exhaust for 2G AWD DSM

  • Backed by real installs and tuning experience at FAST of West Chester

Everyday Low Price:

$849.00
$849.00
Shipping calculated at checkout.

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The STM full 3" stainless steel cat-back exhaust for 2G AWD DSM is made in-house at STM from 3" mandrel-bent tube and tig-welded flanges with an Ultra-Quiet resonator for the perfect mix of sound and performance. Fits AWD models only and fits both 2GA and 2GB rear bumpers. 

The cat-back exhaust utilizes all factory hangers and weighs in at only 19.7 pounds with hardware. The flange to the cat is 3" to fit any aftermarket stock-location 3" HFC or test pipe. Does not fit the factory cat. Pictured installed Cory's 1999 GSX.

Vehicle Fitment:
2G DSM AWD
1995-1999 Eclipse GSX
1995-1998 Talon TSi
• Fits ALL WHEEL DRIVE models only
• Does not fit the stock cat
• Bolts to any test pipe in the stock location using a 3" flange
• Fits STM 2G High Flow Cat

Features & Specs:
• Weighs 19.7 pounds
• Factory cat-back weighs 37 pounds
• Save 17.3 pounds!
• Tig Welded Stainless Steel (Back Purged)
• 3" Piping
• 3" 2-Bolt Flanges
• 3.5" Exhaust Tip

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

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

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

Notes:
STM-2GDSM-EX-SS-25 has been discontinued as of October 29 2025. We no longer offer the 2.5" option to fit the stock cat.

See more STM Parts
See more STM Products
  • Earn FAST points on this part!
  • Backed by real-world installs
  • FAST WC Team Approved
STM Stainless Cat-Back Exhaust for 2G AWD DSM

$849.00

Why Drivers Choose FAST of West Chester

  • I can't recommend this place enough. Being able to trust a shop in the performance world is big. The 2hr drive to get there, is worth knowing the job will be done right. Very happy to have found this shop, to
    support my builds going forward.

    Donald Wojnar

  • I recently had the pleasure of working with FAST of West Chester for some performance upgrades on my 2022 WRX, and the experience was nothing short of exceptional. I opted for a Borla S-Type exhaust and Cygnus Coilovers, and the team at FAST nailed the installation, fitment, and setup to a T.

    Adam Cranston

  • The team at FAST are excellence in every way. First, I consulted with Dave on mods for my HPDE track car. He listened and advised me on the best parts & mods to achieve my goals. He was patient & gave me space to research the options presented & worked with me through several changes before we built. Second, the build execution was flawless, proper heat shielding, bracing and poly everywhere. All components worked as advertised.

    Bryce Budd

  • This place has been my go to shop for all things Subaru. From simple service to performance parts and tuning, they have been top notch.

    William Brunell

  • Excellent shop. They installed a Cobb Stage 2 DP and Whiteline Sway bars and end links on my 2013 WRX. The work was done right and clean. The estimate was accurate. They were very knowledgeable, friendly and gave me the straight scoop on exactly what I was getting for the money
    and what I needed to get where I want to be with it. I'd recommend them
    to any car enthusiast.

    Devin Greco

Does it come with a warranty?

Most products we carry include a manufacturer warranty. Since we work with top performance brands, warranty coverage can vary by product. If you have questions about a specific item, reach out — we’re happy to help.

Do you offer installation help or advice?

Yes — we don’t just sell parts, we install and tune them too. FAST of West Chester is a real performance shop, and we’ve worked hands-on with many of the products we carry. If you have questions about fitment, installs, or building your setup, our team can point you in the right direction.

How fast is shipping?

Many of our products ship the same day or next business day, depending on availability. We work hard to get parts out fast so you can get your build moving without delays.

What’s your return policy?

Returns for exchange or refund are accepted within 30 days of receiving your order. Items must be in new, unused condition and in original packaging. If you have any questions, our team will help make the process easy.

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