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Technical

18mm Diameter

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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Shopping Options

Reach
  1. 10.9mm (0.42") (77)
  2. 11.6mm (.460") (7)
  3. 12.7mm (1/2") (166)
  4. 13.5mm (0.53") (6)
  5. 16mm (5/8") (2)
  6. 17.5mm (0.708") (1)
  7. 18mm (11/16") (5)
  8. 19mm (3/4") (12)
  9. 20.3mm (0.79") (1)
  10. 20.6mm (0.81") (1)
  11. 25.4mm (1") (3)
Manufacturer
  1. AC (17)
  2. Beru (11)
  3. Bosch (55)
  4. Champion (102)
  5. Denso (11)
  6. KLG (27)
  7. Lodge (29)
  8. Motorcraft (29)
  9. NGK (26)
  10. Rare & Collectors (3)
  11. Splitfire (1)
  12. Unipart (1)
Hex Spanner Size
  1. 20.8mm (13/16") (132)
  2. 22.2mm (7/8") (41)
  3. 25.4mm (1") (113)
Terminal Type
  1. 2BA Thread (6)
  2. Fixed Terminal (19)
  3. M4 Thread (181)
  4. UNC Thread (75)
Resistor
  1. No (245)
  2. Yes (23)
Seal Type
  1. Gasket Seat (156)
  2. Tapered Seat (109)
  3. Tapered Thread (3)
Projection Type
  1. Non Projected (177)
  2. Projected (91)
Electrode Material
  1. Copper Core (50)
  2. Double Copper Core (1)
  3. Gold Palladium (6)
  4. Platinum (13)
  5. Silver (1)
  6. Standard Nickel (222)
Tip Configuration
  1. Hesselman (5)
  2. Multi Electrode (14)
  3. Single Electrode (258)
  4. Surface Gap (1)
  5. Triple Electrode (2)
  6. Twin Electrode (4)
Applications
  1. Industrial (27)
  2. Racing (10)
  3. Rare And Collectors (3)
  4. Screened Type (3)
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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King Street Trading Estate
Middlewich
Cheshire
CW10 9LF

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