Your owner's manual lists the schedule for replacing the plugs. Unless you notice a reduction in mileage or performance they are more than likely good for 100,000 miles.
16
Champion
16
A 2004 Hemi has sixteen spark plugs.
They are under the coils in the top of the valve covers.
The late model Hemi's have 16
No. All 16 spark plugs on a 5.7L Hemi are the same.
The Jeep 5.7L V8 HEMI engine has 16 spark plugs (2 for each cylinder)
16
Wrong gap, wrong plug, poor groound when you are looking at the spark,
The Dodge Hemi's have 2 spark plugs per cylinder which equals 16 spark plugs
It has sixteen spark plugs. Two per cylinder.