I changed my plugs not too long ago, and I used NGK copper plugs. I have not had any problems, but I wonder if it would run better with the double-platinums. When I was changing them, I noticed that the plugs on one side of the engine were different from the ones on the other side. Does anyone know why??? Also, what types of plugs are you other Cobra owners running? BTW, if you buy the Motorcraft platinums, expect to pay around $80 for a set.
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'97 Cobra, Rio Red, MAC Cold Air Kit, 3.73s, NGK V-Power
BBK H-pipe w/cats