TDC Indicator Stop Tools

Model 14-K919
Descriptions Used to accurately locate top dead center of the piston’s stroke.
Use this tool, you will not have to remove the plug and measure it.
Use this tool with a cam degree wheel to dial in the cam for maximum horsepower.
 
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14-K919A   10mm (uses NGK plugs beginning with C)
14-K919B   12mm (uses NGK plugs beginning with D)
14-K919C   14mm (uses NGK plugs beginning with B)