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| *B- Meaning it has a 14mm thread size and a 13/16" hex size
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| *P- Projected insulator type
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| *4- Position on heat range from 2-12 (2 hottest, 12 coldest)
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| *H- 12.7mm (1/2") thread reach.
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| *S- Standard 2.5 mm Center Electrode
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| [[cs:NGK BP4HS|NGK BP4HS]]
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| [[Category:NGK Spark Plugs]]
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