what plugs to use with GT 40 heads?

[johnny_munyak]

Getting some GT40 heads for my 95' GT and just thought of something......what plugs will I need for these?

Will they take the same stock plugs as the E7 heads use, or do I need something else?

 

[legalize420]

autolite 764

 

[johnny_munyak]

Are these the same plugs as the stock heads would use?

 

[legalize420]

they are different. stock heads use the autolite 25.

 

[johnny_munyak]

Are these the same plugs a 93' Cobra would use?

 

[FlyBy763]

Are these the same plugs a 93' Cobra would use?

Yes, if the GT40s you have are iron heads. An NGK TR55 would also work.

 

[johnny_munyak]

Yes the heads are the Iron GT 40's.

 

[blksn955.o]

My NGK plugs are TR5 for the stock range. I run a TR6 that is one range colder. Two ranges colder is actually a iridium plug TRi7 or TR7i something like that...this is from NGK's tech line that is VERY helpfull.

NGK's heat range goes opposite from most brands in that as the number gets numerically higher the plug gets colder. Most other brands get hotter as the number goes higher.

I think the TR6 plug is actually a stock LS1 plug IIRC little bit of useless info.

 

[svtdrop]

ford plugs AGSF32C