Re: Spark Plugs

Posted by PackardV8 On 2011/9/8 17:37:00

On the otherhand, i belive it was BH that indicated that AC Delco had recently changed their code system for AC plugs. Probably why GM went bankrupt. But the MMH codeing system for the AC's was used from about 1955 up thru late 80 that i know of. Maybe a wider time range than that.

No other spark plug can make that claim that i know of.