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Spark Plugs

ENGINE	PLUG TYPE	ELECTRODE GAP
3.7L	ZFR6F - 11G (NGK)	1.1 mm (0.043 in.)
4.7L (intake/upper row)	FR8TE2	1.0 mm (.040 in.)
4.7L (exhaust/lower row)	FR8T1332 (iridium tip)	1.2 mm (0.50 in.)
5.7L	REC14MCC4	1.0 mm (.040 in.)