All this disscusion about spark plugs, AGAIN! WORD TO THE WISE: If ya runnin a stock motor, put in the manufacture recommended plugs. If ya runnin a mod motor(ie-higher boost, cam, etc..) go with the zooped up plug F5Dp's, if you like spendin alot of money to drive to and from work. Old saying; Ya pay for what you get! Just my .02 pennies on this fine Sunday morning! <:) M