When Installing a Pro XP engine into a XP/XPT car, these plug wires with a longer boot will allow you to hook up your XP/XPT ignition coil with the Pro XP valve cover with no modifications. The Pro XP valve cover was redesigned to utilize coil on plug. Stock XP/XPT coil wires are too short and not reach the spark plug. These custom wires have the correct length boots to work on new style valve cover. From our experience factory Pro XP coils will not clear your bed cover on an XP/XPT car. We offer many options to install the Pro XP engine in earlier cars depending on your application.
