Originally Posted by robpp
THEY ARE COPPER PLUGS and only good for 30K.
and they have to stay copper or your shit wont run
i cannot tell you why but its a KNOWN FACT that you must replace with exact plugs.
SRT8 excluded from these findings.
That makes sense now on the service interval...but WHY!? It's almost like putting a carburetor on it. Anyway...how hard are the plugs to get to on the 5.7L? Is it like my Trans Am where they make a special tool and shop-labor is billed 6-8 hours to perform the task, or is this like my mustang 5.0 was where I can do it in less time than it takes for the headers to cool off?