Motorcraft SP-463 AZFS22C Copper Spark Plugs 4 Pack - Ford Focus Zetec (One step colder)
Autolite 103 Spark Plugs 4 Pack - Ford Focus Duratec 2.0L & 2.3L - One Step Colder
Brisk Silver Racing GR12S Spark Plugs 4 Pack - Ford Focus Duratec 2.0L & 2.3L - 2 Step Colder