You cannot go wrong with any of the above plugs. Denso Iridium are available for the Duratec engines. Not crazy about their listings showing a different plug for 95 Duratecs. Spark plugs are a personal preference item. No plug will provide more power. A smoother idle? Yup. I personally prefer the +4's. First set went 61k and came out looking like new.
Check out
www.densoiridium.com
