What do NGK Spark Plug numbers mean?

Related questions

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Tags

1. #spark
2. #higher
3. #indicate
4. #opposite
5. #letter
6. #after
7. #hotter
8. #electrodes
9. #copper
10. #plugs
11. #letters
12. #indicates
13. #number
14. #range
15. #ground
16. #things