NGK B4ES - Alternative spark plugs

There are 63 replacement spark plugs for NGK B4ES. The cross references are for general reference only, please check for correct specifications and measurements for your application. When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include Amazon Associates.

    Specifications for NGK B4ES
  • Thread diameter: 14mm
  • Thread reach: 19mm
  • Seat type: flat
  • Hex size: 21mm
  • Tip configuration: non projected
  • Construction: Standard construction
  • Terminal type: Removable
NGK B4ES on Amazon
NGK B4ES Spark Plug
NGK B4ES Spark Plug
25.49$

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Replacement spark plugs for NGK B4ES on Amazon

Replacement spark plugs for NGK B4ES on Ebay

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

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.

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