[joker1999]

due the plugs require gapping on the factory platinum plugs, the store said no but heard something different, anyone know help me out, thanks.

 

[hotcobra03]

gap

due the plugs require gapping on the factory platinum plugs, the store said no but heard something different, anyone know help me out, thanks.

i would check the gap before installing,,anything can happen and you will know before installing,,

also i dont suggest to pry with gap tool to increase gap,,use plyers

pin can bend,,as to gap size your on your own with that

 

[Brutal Metal]

First off you need to take those platinum plugs back and get copper cores, I gap mine to .045, the factory calls for a wider .054!

 

[joker1999]

does the copper ones do better more performance or what?

 

[Brutal Metal]

Its known to be a better spark conductor and they'll run cooler than a comparable heat range platinum!

 

[joker1999]

what is the number for motorcraft copper core plugs for a 99 gt