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The Ford Racing 3V cold spark plug set is a dedicated replacement for Ford 3-valve heads that require a 12 mm thread. These zero-degree plugs are proprietary to Ford Racing and built for engines running higher-than-stock cylinder combustion pressures. They use a colder heat range than OEM Mustang GT and stock 5.4L truck plugs and are supplied as a set to service all cylinders.
Ford Racing FRPP 3V Cold Spark Plug Set (12 mm Thread)
