Upgrade your vehicle's ignition system with a set of 4 Autolite 13 copper resistor spark plugs. These vintage spark plugs have a thread diameter of 14mm and a reach of 0.433in, making them a standard configuration for gasoline vehicles with a 12V voltage. The copper material ensures reliable performance, and the included interchange part numbers (42TS, BL9Y, 43TS, BL11Y) and OE/OEM part number (5613230) indicate compatibility with a wide range of car and truck models. With a length of 3 inches and an installation depth of 0.433 inches, these spark plugs are easy to install and will provide a smooth ride.

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