Autolite AR51 Racing Spark Plug

Common kart application: Yamaha KT100; also permitted where current rules specify AR51. One step hotter than AR50. Autolite Racing plugs use a cut-back ground electrode, nickel plating, and a high-alumina ceramic insulator. Verify the engine builder's specified plug and gap before installation.

Draft catalog item. Confirm dealer cost, current availability, fitment, plug gap, and physical inventory before publication.