Last week i removed the plugs to clean them .... I decide to changed them this weekend .... so i read about two model ... Chmapion 603 XML12 or Autolite 2344

But the one already on the truck got some king of metal spacer ... 2 of thems to be exact on each plug ... Does i need to reinstalled those "metal washer" with the new plugs ?? does they come with it ?? Or the new plugs are design not be to used with those washers ??

Thanks ( i hope you know what i mean by those spacers or washers )