• 15+ Years of Performance Parts, Tuning & Installation

STM Billet Evo X Rear Diff Bracket for Evo 8 Diff Swap

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

Everyday Low Price:

$179.00
$179.00
Shipping calculated at checkout.

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The STM Evo X rear diff bracket is used for swapping an Evo 8 rear differential into an Evo X. CNC machined in house at STM from billet aluminum. Lightweight replacement upgrade for the discontinued OEM 3517A020 bracket.

Vehicle Fitment:
2008-2015 Evolution X with Evo 8 rear diff swap

Purchase Includes:
(1) Billet STM Bracket

Features:
• Billet aluminum
• 4.6 ounces lighter than stock
• STM Products are made in the USA!
• Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects

Weights:
• STM Bracket is 14.71 ounces
• OEM bracket is 19.28 ounces

Install Bolts:
You'll need 3 of the small OEM Evo 8 bolts for install. You'll reuse the large factory Evo X bolt, but if your bolt is looking rough, we offer those new as well:
• Small Evo 8 Bolts (MF140287)
• Large Evo X Bolt (MU000546)

Evo X Axles for Evo 8 Rear Diff Swap:
You'll also need special axles for the rear diff swap.
• DSS 900HP Rear Axles for Evo X with Evo 8/9 Diff

See more STM Parts
See more STM Products
  • Earn FAST points on this part!
  • Backed by real-world installs
  • FAST WC Team Approved
STM Billet Evo X Rear Diff Bracket for Evo 8 Diff Swap

$179.00

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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