are iridium spark plugs better that platinum plugs and if so where can i get some?

Answer 1

Iridium is a very hard precious metal and melts at a much higher temperature than platinum. They will last longer and are more expensive. There's a small drawback iridium electrical conductivity isn't as good as platinum. The difference is so small it won't make much difference. AC Delco, Denso and NGK, make the plugs you are looking for

Answer 2

NGK makes some. Check this page out: http://www.amsoil.com/redirect.cgi?zo=1463115&page=storefront/ngk

Answer 3

They aren't worth squat if you aren't superchaged or have a turbo.