Best Spark Plug Gapper Available Right Now (2023)

Sometimes it might be quite difficult to find the best spark plug gapper. With every niche market offering so many different products, it makes sense that this is the case.

Unfortunately, this very fact can make it incredibly difficult to find the item that best suits your needs, which is why we’ve put together this spark plug gapper buying guide.

Our Favorite Picks:

10 Top Spark Plug Gapper Reviews:

Bestseller No. 1
CRAFTSMAN Spark Plug Gauge, For Automotive Gaps 0.20”- .100” (CMMT14102)
  • VERSATILITY: Quickly gauge spark plug gaps from .020" to .100" (.50mm to 2.53mm)
  • EASE OF USE:Tapered hole is designed to adjust spark plug gap without damaging the electrode 
  • Durable contruction
SaleBestseller No. 2
CTA Tools 3235 Spark Plug Gapper
  • Wide range of professional automotive specialy tools
  • Professional grade
  • Heavy duty design
Bestseller No. 3
ARES 11040 – 2-Piece Spark Plug Gap Gauge Set – Includes Ramp and Wire Gauge – Easily Measure and Adjust Spark Plug Gaps – Dual-Marked SAE and Metric Sizing from 0.020-0.100 Inches and 0.50-2.50mm
  • SPECIFICATIONS: This set includes two types of spark plug gap gauges. The 9-wire gauge covers most of the most common sizes of spark plug gaps, and features a built-in gap adjuster tool that can be used to correct the gap size to the right specification. The ramp gauge features a continuous scale that lets you take quick and easy measurements, and even features a hole that will let you keep it on your keychain.
  • QUALITY: The wire gauge is made of durable steel with chrome plating to help prevent rust and corrosion, and SAE and metric sizes are stamped on both gauges, making it easy to get an accurate reading for your spark plug gap and adjust accordingly.
  • GAUGE SIZING: The ramp gauge measures on a continuous scale from 0.02 to 0.1 inches (0.50mm to 2.50mm). The wire gauge features wire loops for the following sizes: 0.025, 0.030, 0.035, 0.040, 0.045, 0.050, 0.055 0.060, and 0.080 inches (0.64, 0.76, 0.89, 1.02, 1.14, 1.27, 1.40, 1.52, 2.03mm).
  • RELIABLE | EFFECTIVE | EFFICIENT: Users trust ARES to be quality tools. You are backed by our Performance Assurance Limited Lifetime Warranty. If you have any issues with your ARES Spark Plug Gap Gauge Tool Set, simply contact customer service for troubleshooting help, parts, replacement, or refund.
  • ASPCA BUSINESS AMBASSADOR: We are proud to be part of the ASPCA Business Ambassador Program. If you have a pet, you realize they are more than a pet, they are part of the family. With your support, we’re proud to help this great organization.
Bestseller No. 4
Harrier Hardware Spark Plug Gap Gauge Tool, 3-Pack
  • Get the perfect gift for that gearhead in your life with this spark plug gap gauge tool from Harrier Hardware!
  • These gap tools are accurate and easy to read with measurements from 0.02 inches to 0.1 inches (0.02" - 0.1")
  • The opposite side includes metric measurements of 0.5mm to 2.5mm
  • The small hole punched through the disc makes it easy to attach this handy tool to a keychain or store on a hook
  • Includes (3) gap gauge tools
Bestseller No. 5
Lisle 67800 Spark Plug Gapper
  • Package Dimensions: 3.63 L x 4.25 H x 1 W (inches)
  • Package Weight : 0.1 pounds
  • Country of Origin : China
  • Part number: 67800
Bestseller No. 6
Universal Spark Plug Gap Tool Spark Plug Gapping Gapper Tool Kit Compatible with Most 10mm 12mm 14mm Spark Plug Gap Gauge Adjustment Tool
  • Universal Fitment: The spark plug gapper tool is universal for various 10mm 12mm 14mm threaded spark plugs the electrode gap setting. Perfect choice for replacement of spark plug automotive & motorcycle. Warm tip: NOT suitable for short reach plugs!
  • Quality Guarantee:we have very strict requirements on quality, each spark plug gap tool Is strictly tested before leaving the factory, it will give you that perfect gap every time use.
  • Installation:The spark plug gapping is hand-operated, does not need to be additionally mounted on a workbench, just place your spark plug onto the gap tool perfectly, used your desired size feeler gauge for gap thickness, lightly pressure the hand lever to adjust the gap and quickly get a precise gap.
  • Hight quality: The spark plug gap tool made of high quality aluminum with matte red oxide coating, prevent from corrosion and rust, wear resistant and durable, ensures long-term reliable use and storge.
  • Precise Distance: Some spark plugs electrode will spring back - this is normal for some spark plugs.If your gap target is 0.44mm/0.017inch we suggest to use 0.42mm/0.016 this way when it spring back you will get it to 0.44mm/0.017inch.Gap Gauge adjustment tool Gap Gauge adjustment tool
Bestseller No. 7
PQY Universal Spark Plug Gap Tool for Most 10mm 12mm 14mm 16mm Spark Plugs Red
  • ✿PRECISION WORK:This Spark Plug Gap Tool will give you that perfect gap every time.Simply place your spark plug onto the gap tool perfectly.
  • ✿UNIVERSAL FITMENT:Universal for 10mm 12mm 14mm 16mm Spark Plugs.Used your desired size feeler gauge for gap thickness.
  • ✿NOTE: Some spark plugs electrode will spring back - This is normal for some spark plugs.If your gap target is 0.44mm we suggest to use 0.42mm this way when it spring back you will get it to 0.44mm.
  • ✿WHAT YOU GET:1x spark plug gap tool
  • ✿WARRANTY:PQY offers 1 year warranty for the tool.If you have any problem ,please contact us and we will respond you on 24 hours except weekends and holidays.
Bestseller No. 8
12mm & 14mm Engine Spark Plug Caliper - Matte Black Universal Precision Car Spark Plug Gap Tool, Billet Aluminum Spark Plug Caliper Threaded Spark Plugs Gapper Gapping Kit
  • 【Great Compatibility】The engines spark plug gap tool is universal for various 12mm / 14mm threaded spark plugs. (Package includes 1 PC 12mm Spark Plug Gap Tool and 1 PC 14mm Spark Plug Gap Tool.)
  • 【High Performance】Gives perfect gap to help you easily and properly replace the old or damaged spark plug for improving your vehicle performance and efficiency. No more banging the plug tip on random surface to close it and then use a coin gap to open it back up, saves your time and energy.
  • 【Easy Operation】Simply put the spark plug in one end and twist the knob at the other to apply smooth, and easy pressure to close the gap until the right measurement is found.
  • 【Superior Material】Made of top quality Aluminum with matte black oxide coating, prevent from corrosion and rust, wear resistant and durable, ensures long-term reliable use. Compact, lightweight, easy to carry and store.
  • 【100% Satisfaction Guarantee】If you're not satisfied with our Universal Precision Car Spark Plug Gap Tools Set, simply return it for a full refund in 30 days. While you have any questions about our products, please feel free to contact us and we will provide the best service. Always buy confidently in Bonbo!
Bestseller No. 9
Toolwiz Spark Plug Gap Tool, Universal Spark Plugs Gapper, Gap Measuring and Adjustment Kit Fits for Most 10mm 12mm 14mm 16mm Spark Plugs (Red)
  • Universal Fitment- Design for easy use and proper fit, this spark plug gap tool is compatible with almost all 10mm 12mm 14mm 16mm spark plugs. NOT for 18mm thread and short reach spark plugs, please check the size of your spark plugs before purchase
  • Effort Saving- Spark plug gapper allows you to adjust the gap with less time and effort. Simply place the spark plug onto the tool and select your desired size feeler gauge, then screw the knob slowly till the side electrode compresses to the desired gap thickness (Not including feeler gauge)
  • High Quality- Built for durable long term use, coated with anodized aluminum smooth surface, this saprk plug gap measuring tool is anti-corossion and anti-scratch. With its sturdy inner size, the tool for spark plug can greatly pevent spark plug wire marks or or nicks for optimal spark plug and engine performance
  • Adjustment Tips- For normal physical phenomena, some spark plugs electrode will spring back when adjust the gap. You are suggested to use 0.028in feeler gauge size if your desired gap is 0.003in, smaller scale than the target gap is recommended
  • Warranty Garantee- You will get 1-Pack of Toolwiz universal spark plug gauge gap tool. Backward with 30-day money back and 12 months quality warranty. If there is any we can help regarding product use, please do not hesitate to contact us for further assistance
SaleBestseller No. 10
GEARWRENCH SAE/Metric Spark Plug Gap Gauge - 3293D
  • Circular coin-type ramp gauge
  • Easily measures spark plug gaps
  • From .020" to .100" and .6mm to 2.4mm
  • Gap spreader tool on top
  • Convenient tether point

Last update on 2023-03-27 / Affiliate links / Images from Amazon Product Advertising API

How to find the best spark plug gapper?

Here, we’ll be going over a number of factors that you can use to ensure that you’re purchasing the best spark plug gapper for you.

Regardless of which type of item you’re looking to buy, chances are that there are existing buying guides on the internet, all of which aim to give you good spark plug gapper recommendations.

Despite these recommendations, however, it’s always a good idea to do your own research. In addition to this research, asking yourself the following questions is also super helpful:

  • What features does the spark plug gapper need to have to be perfect for my needs?
  • What is my budget?
  • Do I need to purchase a certain brand?

Once you’ve answered these questions and have a good idea of what you’re looking for and the buying process becomes much easier. Keep in mind that when looking for the best product, there’s no need to rush. In fact, very rarely are the ideal products found by choosing the first one you see or by basing your decisions on only one factor. Take your time and enjoy the process!

Now, with the answers to the previous questions in mind, we urge you to use our upcoming buying guide for spark plug gapper to find what you’re looking for:


In some cases, the brand of spark plug gapper is very important. For example, if you’re looking for an item that works in tandem with another, you might very well need both products to be the same brand. If this is the case, it’s vital to pay attention to this factor, as choosing the wrong product can mean the difference between wasting your money and buying a great product that functions as it should.


The features in any given spark plug gapper are important because they can dictate which version of an item you need and how much money you need to spend. Consider all the key features that you want your item to have and don’t settle for anything that doesn’t check at least ¾ of your boxes.


Customer reviews about spark plug gapper are crucial – especially when you’re buying a product that costs a lot of money or serves a big importance. Luckily, most products can be found online, which means that it’s common for there to be scores of customer reviews from those who have already purchased any given product.

Pay attention to these reviews. Take note of the pros and cons that they mention, and factor these into your big decision. In some cases, you’ll be forced to sacrifice one con in order to gain a particular pro, but being aware of the potential con is going to be beneficial in either case.


Of course, quality is key. You don’t want to purchase a low-quality product. If you do, you run the risk of your item breaking, not working properly, or otherwise proving to be very disappointing, as well as a waste of money.

You can compare spark plug gapper quality by researching what your potential purchases are made from, contrasting the individual items against each other to discern which one is made of the best materials.


Warranty isn’t always going to be important, but it definitely can be. This is especially true if the item in question is tech-related or expensive. A good warranty will be valid for an extended time after purchase and cover a variety of problems ranging from item defects to random accidents, water damage, and other miscellaneous events that could ruin your product.


The quest to find the best spark plug gapper can be daunting – but it doesn’t have to be. It can be made much easier by asking yourself a few simple questions and then thinking critically about the items you want to buy. Consider their features, quality, brand, warranty, and customer reviews and you’re more likely to make a great purchase.