spark plugs

i brought my car to a local shoped owned by a guy who races trucks and wat not, i was having my plugs change while i was at work and he told me to use autolite ar103 racing plugs vs ngk tr6's has anyone used these plugs before????wat about them?

i dont know much about them, just make sure the temp range is ok since you are on spray.    tr6 is where u should be, but if those other plugs have the same temp range ur ok

yeah its a heat range lower so they will work, i guess im gonna try them out...