Ford Motorcraft factory replacement double platinum plugs (AWSF 34PP) are
the most reliable to use. Others have had success with different brands, but the
factory plugs seem to receive the most praise. Spark plug wires, however,
should be upgraded aftermarket equipment. Magnecor is preferred and some
claim success with Jacobs. Both offer superior wires for SC/XR7 applications.
the most reliable to use. Others have had success with different brands, but the
factory plugs seem to receive the most praise. Spark plug wires, however,
should be upgraded aftermarket equipment. Magnecor is preferred and some
claim success with Jacobs. Both offer superior wires for SC/XR7 applications.