NGK V-Power Spark Plugs (4.0L) XJ If your vehicle is equipped

If your vehicle is equipped with a "tow package" from the dealer expect modification to your transmission cooler area

Improved Power

If hot-rodding is what you're looking for then consider the numbers

a precision manufactured component that contributes to the overall strength and reliability of the pulley assembly

NGK V-Power Spark Plugs (4.0L) XJ If your vehicle is equippedNGK V Power Spark Plugs (6 pack) Economical performance and improved ignitability over standard Spark Plugs original equipment manufacturer and racer approved. Lowers ignition system voltage requirements Greater ignitability and performance over conventional spark plugs Trivalent Metal Plating has superior anti corrosion and anti seizing properties Increased fuel economy and lower emissions Highly durable against electrical and chemical wear Good