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NGK B4ES - Alternative spark plugs

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Replacement spark plugs for NGK B4ES on Amazon

Applications of NGK B4ES

Brand Model Engine size HP KW Year Engine # of cyl Spark plug gap
B.S.A. C10 Alu Head 250 1938 - 1953 1 0.5
B.S.A. M20 Alu Head 496 1937 - 1955 2 0.5
B.S.A. M21 Alu Head 591 1937 - 1963 2 0.5
B.S.A. M21 Alu Head 591 1937 - 1963 2 0.5

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The spark plug Cross references are for general reference only. Check for correct application and spec/measurements. Any use of this cross reference is done at the installers risk.