Port Insert Tool for 5.4L Two Valve Engines - Compatible Replacement for 389-100, 2pcsStyle: Package 2About this item Compatibility: This Spark Plug Port Insert Tool is compatible with 4.6L, 5.4L, and 6.8 V-10 Triton Two Valve Engines. Material: Made of high-quality oversized steel alloy, it repairs other inserts that fail without any adverse effects from heat transfer. Spark plug size: The spark plug port inserts tool has a spark plug size of m14-1.25. Year of use: It is suitable for use on engines manufactured between 1996 to 2003, with part number CAL389-100. Package: The package includes two pieces of the spark plug port inserts tool. Dimensions: 4.76 x 3.66 x 0.91 inches.