Performance Tool W86910 M14×1.25 spark plug thread repair kit
Check compatibility
W86910 repairs an M14×1.25 plug opening. Its three listed insert lengths serve different reaches, so compare the required depth with the equipment instructions before selecting an insert.
Questions before ordering
How should I choose one of the three insert lengths?
Compare the original thread reach and equipment guidance. The listed lengths are 5/16, 7/16 and 5/8 inch, all for the same repair thread.