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18mm Diameter

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Items 1 to 12 of 312 total

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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") (77)
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  4. 12.7mm (1/2") (163)
  5. 13.5mm (0.53") (6)
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  10. 20.3mm (0.79") (1)
  11. 20.6mm (0.81") (2)
  12. 25.4mm (1") (3)
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  4. Champion (103)
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About GSP
Green Spark Plug

Green Spark Plug Co. Ltd has now added a dedicated sales and distribution team to handle customers questions and pre-sales enquires, we are experts in our field so if you have a query let us know!

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Middlewich
Cheshire
CW10 9LF

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