My car was produced in 12/97....so i think i have return style ..ok i think i got it all figured out....thanks for the help...i went ahead and got ngk tr6 plugs at .035"...that should be good for a 55-75 shot right...i dont plan on much usage...but i dont know how long that will last, i am trying to avoid buying a custom burnt chip right now..i have a superchip now which i will have to remove and sell...i wish i could get a chip or something to jus change shift points...i have an atx.