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Review on πŸ”§ Innovative Products Of America 7880 6-inch Long 14mm Thread Top Dead Center Indicator, Black by Todd Phillips

Revainrating 5 out of 5

Nice tool but as others have said not for slanted cork holes.

Rolled on my Pontiac 400. My spark plug holes don't line up with the movement of the cylinders and it jammed when cranking the engine by hand. Great quality and I'm leaving it because it's great for an engine with pistons pushing right up to the spark plug.

Pros
  • 1/8 inch pitch
Cons
  • Can't remember but there was something