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Technical

18mm Diameter

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Items 1 to 12 of 317 total

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  5. 5

18mm Diameter

18mm Diameter spark plugs from popular manufacturers including Bosch, NGK, Champion and Denso.

To find the right spark plug for your vehicle try our Spark Plug Finder

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  1. 10.9mm (0.42") (78)
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  5. 13.5mm (0.53") (6)
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  8. 18mm (11/16") (5)
  9. 19mm (3/4") (12)
  10. 20.3mm (0.79") (1)
  11. 20.6mm (0.81") (2)
  12. 25.4mm (1") (3)
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  4. Champion (107)
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  2. 22.2mm (7/8") (44)
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