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STM Spark Plug Gapper Tool

  • Backed by real installs and tuning experience at FAST of West Chester
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$37.00
$37.00
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The STM Spark Plug Gapping Tool allows for easy handling of your spark plug and gauge for for a smooth, controlled and precise gap. So you can stop banging your plugs on random hard surfaces! Please confirm the thread size for your plugs before purchase.

Vehicle Fitment:
• For 12mm or 14mm spark plug threads
• See fitments below

Features:
• USA-made
• Billet aluminum
• Super easy to use tool

12mm Gapper Tool for:
Mitsubishi Lancer Evolution X
Nissan R35 GT-R
Nissan 350Z 2007 - 2009
Nissan 370Z 2009 - 2016
Infinity G35 11/2006 - 2008
Infinity G37 2008 - 2013
Subaru BRZ
Scion FR-S
Subaru 2015+ FA20 WRX

14mm Gapper Tool for:
Mitsubishi Lancer Evolution 1/2/3/4/5/6/7/8/9
Mitsubishi 1G/2G DSM (Eclipse/Talon/Laser)
Mitsubishi 3000GT
Dodge Stealth
Subaru STi 2004-2018
Subaru WRX 2002 - 2014
Nissan 350Z 2003 - 2006
Infinity G35 2003 - 10/2006
Ford Focus ST 2013 - 2017
Ford Focus RS 2016 - 2017
Lamborghini Huracán
Lamborghini Gallardo
Audi R8 V8/V10
Toyota GR Corolla/Yaris

See more STM Parts
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  • Earn FAST points on this part!
  • Backed by real-world installs
  • FAST WC Team Approved
STM Spark Plug Gapper Tool

$37.00

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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