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Spark Plugs

WARNING: This page is about a different car, the 2006 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
ENGINE PLUG TYPE ELECTRODE GAP
3.7L ZFR6F - 11G (NGK) 1.1mm (0.042 in.)
4.7L RC12MCC4 1.01 mm (.040 in.)
5.7L Champion - RE14MCC4 1.14 mm (.045 in.)