• 15+ Years of Performance Parts, Tuning & Installation

STM Evo X Bellmouth Intake

  • Backed by real installs and tuning experience at FAST of West Chester
Turbo Inlet Size:
Finish Option:

Everyday Low Price:

$399.00
$399.00
Shipping calculated at checkout.

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The STM Evo X bellmouth intake kit incorporates a huge 6" velocity stack to utilize the air space of the giant K&N filter to keep air flowing smoothly into your turbo. Matching aluminum intake heat shield is included as well as a STM silicone coupler to match your 2.75" or 3" turbo inlet, clamps, brass fittings, block off's and vacuum hose for a clean install.

Vehicle Fitment:
2008-2015 Mitsubishi Evolution X
• Fits stock turbo (2.75" inlet) or stock-replacement turbo (3" inlet)
• You will need to cut and re-route your blow off valve recirculation hose.

Features:
• For Stock Turbo (2.75" Inlet) or Upgraded (3" Inlet)
• Barb Fittings with Optional Block Off's for Vacuum Lines
• Stainless & Brass Hardware
• CNC MAF Flange
• Heatshield Included
• Lightweight Aluminum Piping
• Hand Fabricated
• Choice of Finish
• High-Quality Couplers
• Stainless Clamps
• STM Products are made in the USA!
• Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects.

Finish Options:
• Gloss Black Powdercoat
• Wrinkle Black Powdercoat

Kit Includes: Install Notes:
(1) 6" K&N Filter (RU-1036)  
(1) STM Aluminum Pipe  
(1) STM Aluminum Heatshield  
(1) 1.75" Worm Clamp for BOV  
(2) Worm Clamps for Coupler (2.75" & 3" for Stock Turbo or Two 3" for Upgraded)
(1) STM Silicone Coupler (2.75" to 3" Reducing for Stock Turbo or 3" for Upgraded)
(1) 1/4" NPT to 1/2" Barb 90° Brass Fitting (Used for valve cover vent tube)
(1) 1/4" NPT Block-Off Brass Fitting (Optional. Used when not venting valve cover)
(1) 1/8" NPT Barb Brass Fitting (Used for boost control return line)
(1) 1/8" NPT Block-Off Brass Fitting (Optional. Used when not returning boost control line)
(2) M8 1.25x20 Button-Head Stainless Allen Bolts (For mounting Heat Shield to frame-rail)
(2) M8 Stainless Flat Washers (For Heat Shield bolts)
(2) 10-32 x 5/8 Stainless Allen Bolts (For MAF Flange)
(1) One Foot 6mm Silicone Vacuum Hose (For relocating BOV)
See more STM Parts
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  • Earn FAST points on this part!
  • Backed by real-world installs
  • FAST WC Team Approved
STM Evo X Bellmouth Intake

$399.00

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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