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First Fire 13/16-in 4-cycle Engine Spark Plug

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  • Replaces Champion RN7YC, N7YC, RN4C, N4C

  • Replaces NGK B5EB, B6EB, B6EB-11, B6EBL-11, B6ES, B6ES-11, B6EV, B6EVX, B7EB, B7EVB-11, B7ES, B7ES-11, BP7ES, BP7ES, BP7ES-11, BR6EB, BR6EB-11, BR6ES, BR6ES-11, BR7EB, BR7EB-11, BR7EIX, BR7ES, BR7ES-11, BUR6EV, BUR7EB-11

  • Replaces Autolite: 403, 404,405,4056

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