best spark plugs?

[EastBayStang98]

ol i realize now that i need new spark plugs, i have autolite single platinums in there now, what would be the best plug to replace them with?

 

[MustangChris]

in MY OPINION:

naturally aspirated with stock gap: Bosche 4 prong irrydium platnum plugs...

any other application (larger gap, boost, n2o NGK

 

[Venom351R]

Nothing wrong w/ Copper core plugs. Thats what Ive always used. I have autolite copper core plugs in it now.

 

[97vertstang]

autolite

 

[2slo95fiveoh]

In my previous experience the 5.0 cars HATE platnium plugs. Now i realize that you have a 98, so no 5.0 for you, but i would go to your local
parts store and see what factory equiptment was when it comes to spark plugs. Motorcraft, NGK, and Autolite are the only brands i have
experience with, and they all work great, currently with NGK v-power in my 95. So if your 98 came factory with a copper style plug, then
go with that, the brand is up to you. If it came factory with a platnium or iridium(i highly doubt for a mustang) then go with those. I would
stay away from the quadrouple platnium and double fire super awesome plugs, and just stick to the basic requirements for factory specs.

 

[Venom351R]

stay away from the quadrouple platnium and double fire super awesome plugs, and just stick to the basic requirements for factory specs.

Most of those are a bunch of mumble jumble. I think they tested one of those fancy smancy plugs on Horse Power TV and the gain was not even worth the effort of putting them in and nothing that would have made a difference at the rear wheels