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The spark plug gap is the distance between the center and side electrodes. It's critical to engine performance because it influences the heat range of the spark produced to ignite the air-fuel mixture in the combustion chamber.


A smaller gap ensures the spark plug fires on each cycle. A wider gap can lead to a longer electric arc, which can result in better ignition of the fuel and air mixture, leading to improved engine performance and horsepower. 


If the gap is too small, the spark will likely be too weak and cause the engine to run poorly or with poor efficiency. A gap that is too wide might prevent a spark from firing at all.


The Buckshot Racing #77 all-billet aluminum Precision Spark Plug Gap Tool allows you to delicately adjust your j-gaps with the most exact precision (across all plugs) without compromising the strength of your ground electrode or damaging the center electrode.


Included one (1) Precision Spark Plug Gap Tool to precisely set the gap the first time (without opening and closing the j-gap over and over again) and one (1) Coin Gapper to slightly open the ground electrode before setting and also measure a precison gap.


Contact Mike Hill at

Precision Spark Plug Gapper + Coin Tool

Adaptor Color
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