Arnold FirstFire 13/16 In. Spark Plug

Consistent starts, dependable performance, superior fouling resistance. Replaces Champion RN9YC, RN11YC, RN11YCA, RN12YC; replaces NGK B4E, B4ES, B5EB-11, B5ES, B5ES-11, B5EV, BP4E, BPES, BPR5EA-L, SP5ES, BP5ES-11, BP5EV, BP5EY, BP6EKA, BP6ES, BP6ES-11, SP6ET, BP6EV, BP6EY, BP7ES, BP7ES-11, BP7EV, BPR2ES, BPR4ES, BPR4ES-11, BPR5EA-L, BPR5EIX, PBR5EP, BPR5ES-11, BPR5EV, BPR5EY, BPR6E, BPR6EIS, BPR6ES, BPR6ES-11, BPR6EY, BPR7EIS, BPR7ES, BPR7ES-11, BPR4ES, BPR5ES-11, BUR4EB-11, BUR5EB-11, BURGEA, BUR7EA-11, GR4, GR45, GR55; replaces Autolite 63, 64, 405, 4263, 4265.