There is something in the owner's manual about changing plugs in the
5.7L HEMI every 25,000 miles. My Magnum RT is due. Anybody done
this yet? Anything I need to know before I start? I see there are
two plugs per cylinder, one with coil-on-plug module and one without.
In both cases, there are small bolts which hold down the wiring/boot.
Any point to upgrade to better quality plugs, if they are supposed to
be changed every 25,000?