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Old 05-02-2011, 01:07 PM
jgshannon jgshannon is offline
Dodge Ram Forum Senior Member
Join Date: Mar 2011
Location: Sioux Falls, SD
Age: 24
Posts: 90
Gender: Male
Vehicle: 2005 Dodge Ram 1500
Trim Level: SLT
Color: Bright Silver Metallic
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
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jgshannon is on a distinguished road

I don't know about the 4.7 but the Hemi has two plugs per cylinder that run off of a single coil. I wouldn't dare mismatch the coils because I've heard of the adverse effects that come with just running a higher grade plug, let alone an entirely different coil.
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