04 Hemi, Taylor Shorty wires 8.2 or 10.4 MM ? Thundervolt or? and Plugs 06 Conversion
Administrator
Joined: Apr 2010
Posts: 87,475
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From: Clayton MI
A fair few of the dodge systems simply don't like the rare-earth plugs. On the magnum engines, they led to mystery misfires, and other interesting performance problems.... Straight coppers, and all those problems went away.
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Veteran
Joined: Mar 2015
Posts: 310
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From: NY
I ordered 4 NGK Plugs not 16, they went into a Toyota. I was trying to advise him about counterfeits and that was my run in with them. The last Plugs lasted 100,000 Miles these less then 10K. The Dodge gets Copper either Champion or NGK but from a reputable source.